id,number,title,question,claim,short_answer,explanation,category,category_slug,url,source_names,source_urls,source_tiers,confidence,verified_date,verified_by,date_published,date_modified,ai_assisted
1,1,"A Day on Venus Is Longer Than Its Year","Is a day on Venus longer than a year?","Venus takes 243 Earth days to rotate once but only 225 Earth days to orbit the Sun, so a day on Venus is longer than its year.","Yes. Venus spins so slowly that one rotation takes 243 Earth days, while one trip around the Sun takes only 225 Earth days.","A planet's day is the time it takes to spin once on its axis, and its year is the time it takes to travel once around the Sun. On Earth the day is far shorter than the year, so hundreds of days fit into each orbit. Venus is the opposite. According to NASA, Venus needs 243 Earth days to complete a single rotation, yet it finishes an orbit of the Sun in only 225 Earth days. That means the planet completes a full lap of the Sun before it has finished turning once. In NASA's words, a day there would be longer even than a Venus year.",Space,space,https://factfusionai.com/fact/a-day-on-venus-is-longer-than-its-year/,"NASA | NASA Planetary Fact Sheet","https://science.nasa.gov/venus/venus-facts/ | https://nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
2,2,"Olympus Mons Is the Largest Volcano in the Solar System","What is the largest volcano in the solar system?","Mars is home to Olympus Mons, the largest volcano in the solar system, whose base covers an area about as large as the US state of Arizona.","The largest volcano in the solar system is Olympus Mons on Mars. NASA describes its base as covering an area as large as the state of Arizona.","Volcanoes are not unique to Earth, and the biggest one known is on another planet. NASA states that Mars is home to the largest volcano in the solar system, Olympus Mons, and that its base covers an area as large as the state of Arizona. A single mountain with a footprint the size of a large US state is hard to picture, which is why NASA uses the comparison. Mars holds a second record on the same NASA page. Valles Marineris, which NASA describes as the largest canyon in the solar system, extends about 2,400 miles, or 3,870 kilometers, in length. Together the two features give Mars both the largest volcano and the largest canyon known in the solar system.",Space,space,https://factfusionai.com/fact/olympus-mons-on-mars-is-the-largest-volcano-in-the-solar-system/,"European Space Agency | NASA","https://www.esa.int/Science_Exploration/Space_Science/Mars_Express/Olympus_Mons_-_the_caldera_in_close-up | https://science.nasa.gov/mars/facts/","A | A",90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
3,3,"About 1.3 Million Earths Could Fit Inside the Sun","How many Earths can fit inside the Sun?","It would take about 1.3 million Earths to fill the volume of the Sun.","About 1.3 million. NASA says it would take that many Earths to fill the Sun's volume.","The Sun is so much larger than Earth that the comparison is hard to picture. NASA puts it in terms of volume: it would take 1.3 million Earths to fill the space the Sun occupies. The figure describes volume, meaning how much room the Sun takes up, and not its weight or its width. NASA's fact page gives other numbers on the same scale. The temperature in the Sun's core is about 27 million degrees Fahrenheit, or 15 million degrees Celsius. The solar system was forming about 4.6 billion years ago, and the Sun is about 93 million miles, or 150 million kilometers, from Earth.",Space,space,https://factfusionai.com/fact/about-1-3-million-earths-could-fit-inside-the-sun/,"NASA | NASA Planetary Fact Sheet","https://science.nasa.gov/sun/facts/ | https://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
4,4,"Jupiter's Great Red Spot Is Wider Than Earth","How big is Jupiter's Great Red Spot?","Jupiter's Great Red Spot is about 1.3 times as wide as Earth, according to Juno-era measurements reported by NASA's Jet Propulsion Laboratory.","Yes. NASA's Jet Propulsion Laboratory reports that the Great Red Spot is about 1.3 times as wide as Earth. Older NASA pages say twice as wide, because the storm has been shrinking.","The Great Red Spot is a giant storm in Jupiter's atmosphere, a swirling oval of clouds that has been watched for more than 300 years. JPL reports that it has been monitored since 1830 and may have existed for more than 350 years. The storm is not a fixed size. Images taken decades apart by the Hubble Space Telescope show it shrinking. That is why NASA's general Jupiter facts page still describes it as twice as wide as Earth, while JPL, reporting measurements from the Juno mission, gives about 1.3 times as wide as Earth. We use the newer figure. Juno also used its Microwave Radiometer to look below the cloud tops and measure how deep the storm reaches, so scientists now know it is far deeper than the clouds we see.",Space,space,https://factfusionai.com/fact/jupiters-great-red-spot-is-twice-as-wide-as-earth/,"NASA | NASA Jet Propulsion Laboratory","https://science.nasa.gov/jupiter/jupiter-facts/ | https://www.jpl.nasa.gov/news/nasas-juno-probes-the-depths-of-jupiters-great-red-spot/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
5,5,"Saturn Is Less Dense Than Water","Would Saturn float in water?","Saturn is the only planet in our solar system with an average density lower than that of water.","Yes. Saturn's average density is less than water's, which NASA illustrates by saying the planet could float in a bathtub if one that large existed.","Density is how much mass is packed into a given volume. An object that is less dense than water floats in it, and one that is denser sinks. NASA states that Saturn is the only planet in our solar system with an average density that is less than water. To make the point, NASA adds that the giant gas planet could float in a bathtub, if such a colossal thing existed. The comparison is an illustration and not a real experiment, since no body of water could hold a planet. The word average matters as well. It describes the planet taken as a whole, and it does not mean that every part of Saturn is lighter than water.",Space,space,https://factfusionai.com/fact/saturn-is-less-dense-than-water/,"NASA | NASA Planetary Fact Sheet","https://science.nasa.gov/saturn/facts/ | https://nssdc.gsfc.nasa.gov/planetary/factsheet/saturnfact.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
6,6,"The Moon Drifts About 1.5 Inches Farther From Earth Every Year","Is the Moon moving away from Earth?","Laser measurements show the distance between Earth and the Moon increasing by about 1.5 inches (3.8 centimeters) a year.","Yes. Laser measurements show the Moon moving about 1.5 inches (3.8 centimeters) farther from Earth each year, NASA's Jet Propulsion Laboratory reports. NASA's Moon facts page rounds this to about an inch.","The distance between Earth and the Moon is not fixed. Apollo astronauts left reflectors on the Moon's surface, and observatories in New Mexico, France, Italy and Germany still fire lasers at them. They time how long a pulse takes to bounce back, which fixes the Moon's distance to within a few millimeters. These lunar laser ranging measurements show the gap growing by about 1.5 inches, or 3.8 centimeters, every year, according to NASA's Jet Propulsion Laboratory. NASA's general Moon facts page gives a rounder figure of about an inch a year. We use the measured value. The change is far too small to notice in the night sky in a lifetime. Over millions of years, though, it adds up, and the Moon was much closer to Earth in the distant past than it is today.",Space,space,https://factfusionai.com/fact/the-moon-drifts-about-an-inch-farther-from-earth-every-year/,"NASA | NASA Jet Propulsion Laboratory","https://science.nasa.gov/moon/facts/ | https://www.jpl.nasa.gov/news/the-apollo-experiment-that-keeps-on-giving/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
7,7,"The Ocean's Deepest Known Point Is Nearly 11 km Down","How deep is the Mariana Trench?","The deepest known part of the ocean, the Challenger Deep in the Mariana Trench, is approximately 10,935 meters (35,876 feet) deep.","The Challenger Deep, at the southern end of the Mariana Trench in the western Pacific, is about 10,935 meters (35,876 feet) deep.","The ocean floor is far from flat, and its lowest known point lies in the western Pacific. NOAA's National Ocean Service identifies it as the Challenger Deep, located at the southern end of the Mariana Trench, several hundred kilometers southwest of Guam. NOAA gives its depth as approximately 10,935 meters, or 35,876 feet. For comparison, the same NOAA page puts the average depth of the ocean at about 3,682 meters, or 12,080 feet. The Challenger Deep is therefore roughly three times deeper than the ocean is on average. The word approximately is deliberate. Measuring a point that far below the surface is difficult, so the figure is given as an estimate and not as an exact number.",Ocean,ocean,https://factfusionai.com/fact/the-deepest-known-point-in-the-ocean-is-nearly-11-kilometers-down/,"Bongiovanni, Stewart and Jamieson, Geoscience Data Journal | NOAA National Ocean Service","https://nora.nerc.ac.uk/id/eprint/530930/ | https://oceanservice.noaa.gov/facts/oceandepth.html","A | A",90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
8,8,"The Great Barrier Reef Is Earth's Largest Living Structure","What is the largest living structure on Earth?","The Great Barrier Reef is the largest living structure on Earth, stretching for 1,429 miles over an area of approximately 133,000 square miles.","It is the Great Barrier Reef. NOAA says it stretches 1,429 miles, covers about 133,000 square miles and is large enough to be visible from space.","A coral reef is built by living animals, which is why a reef can be described as a living structure. NOAA's National Ocean Service states that the Great Barrier Reef is the largest living structure on Earth. According to NOAA, it stretches for 1,429 miles over an area of approximately 133,000 square miles. It is not a single unbroken wall of coral. NOAA describes it as made up of nearly 3,000 individual reefs. Taken together they form a system so extensive that, in NOAA's words, it is large enough to be visible from space. The size figures are given as approximate, because the edge of a reef system is not a sharp line.",Ocean,ocean,https://factfusionai.com/fact/the-great-barrier-reef-is-the-largest-living-structure-on-earth/,"ESA | NOAA National Ocean Service","https://www.esa.int/Applications/Observing_the_Earth/Earth_from_Space_World_s_largest_living_structure | https://oceanservice.noaa.gov/facts/gbrlargeststructure.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
9,9,"The Blue Whale Is the Largest Animal Ever to Live","What is the largest animal that ever lived?","Blue whales are the largest animals ever to live on Earth, reaching up to about 110 feet in length and up to 330,000 pounds in weight.","The blue whale. NOAA Fisheries says blue whales are the largest animals ever to live on our planet, at up to about 110 feet and 330,000 pounds.","The largest animal known is alive today and lives in the ocean. NOAA Fisheries states that blue whales are the largest animals ever to live on our planet. The agency lists a length of up to 110 feet and a weight of up to 330,000 pounds, and it notes that these upper figures apply to Antarctic blue whales. NOAA places the species in the baleen whale family, also called the great whales, and describes it as the largest of the rorquals, a group within that family. The phrase ever to live is the important part of the claim. It means the comparison is not limited to animals alive now, and covers every animal known to have existed.",Animal,animal,https://factfusionai.com/fact/the-blue-whale-is-the-largest-animal-ever-to-live/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/blue-whale,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
10,10,"A Cheetah Can Go From Zero to 45 mph in 2.5 Seconds","How fast can a cheetah accelerate?","Cheetahs, the fastest land mammals, can accelerate from zero to 45 miles per hour (72 km/h) in about 2.5 seconds and reach top speeds of 60 to 70 miles per hour.","A cheetah can reach 45 mph in about 2.5 seconds. Its top speed averages 60 to 70 mph, which it can hold for only about 300 yards.","The cheetah is built for short bursts of speed, not long chases. The Smithsonian's National Zoo describes it as the fastest land mammal and gives figures for both its acceleration and its top speed. A cheetah can accelerate from zero to 45 miles per hour, or 72 kilometers per hour, in just 2.5 seconds. Its top speed averages between 60 and 70 miles per hour, or 96 and 112 kilometers per hour. The catch is endurance. According to the zoo, that top speed can be maintained for only about 300 yards, or 274 meters. At full speed a cheetah covers 23 feet, or 7 meters, in a single stride and completes four strides per second.",Animal,animal,https://factfusionai.com/fact/a-cheetah-can-go-from-zero-to-45-mph-in-2-5-seconds/,"Smithsonian's National Zoo and Conservation Biology Institute",https://nationalzoo.si.edu/animals/cheetah,B,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
11,11,"An Octopus Has Three Hearts","How many hearts does an octopus have?","An octopus has three hearts: one circulates blood around the body, while the other two pump it past the gills to pick up oxygen.","Three. One heart sends blood around the body and the other two pump it past the gills, according to the Natural History Museum in London.","An octopus does not rely on a single heart. The Natural History Museum in London explains that an octopus's three hearts have slightly different roles. One heart circulates blood around the body, while the other two pump it past the gills, where it picks up oxygen. The blood itself is unusual as well. The museum notes that octopus blood is blue, because the protein that carries oxygen, haemocyanin, contains copper. Human blood uses haemoglobin, which contains iron. According to the museum, the copper-based protein is more efficient at transporting oxygen in cold and low-oxygen conditions, which makes it well suited to life in the ocean. Three hearts and blue blood are both part of how the animal moves oxygen around its body.",Animal,animal,https://factfusionai.com/fact/an-octopus-has-three-hearts/,"Natural History Museum, London",https://www.nhm.ac.uk/discover/octopuses-keep-surprising-us-here-are-eight-examples-how.html,B,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
12,12,"The Wright Brothers' First Flight Lasted Just 12 Seconds","How long was the Wright brothers' first flight?","The first flight of the 1903 Wright Flyer, on December 17, 1903 at Kitty Hawk, North Carolina, lasted 12 seconds and covered 36 meters (120 feet).","Twelve seconds. With Orville Wright at the controls, the 1903 Wright Flyer travelled 36 meters (120 feet) on its first flight.","The first flight of the Wright brothers' airplane was over almost as soon as it began. The Smithsonian's National Air and Space Museum, which lists the 1903 Wright Flyer in its collection, records that the aircraft first flew on December 17, 1903, at Kitty Hawk, North Carolina. Orville Wright was the pilot. The museum describes it as a 12-second flight that covered 36 meters, or 120 feet. Both numbers are small. Twelve seconds is a fifth of a minute, and 120 feet works out at an average of ten feet for every second in the air. The details here come from the museum's own record of the aircraft, which is why the date, place, pilot, time and distance can all be stated precisely.",History,history,https://factfusionai.com/fact/the-wright-brothers-first-flight-lasted-just-12-seconds/,"Smithsonian National Air and Space Museum",https://airandspace.si.edu/collection-objects/1903-wright-flyer/nasm_A19610048000,B,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
13,13,"Only Two of Apollo 11's Three Astronauts Walked on the Moon","Did all three Apollo 11 astronauts walk on the Moon?","During Apollo 11, which landed on the Moon on July 20, 1969, Neil Armstrong and Buzz Aldrin walked on the surface while Michael Collins remained in orbit.","Two of the three. Neil Armstrong and Buzz Aldrin walked on the Moon on July 20, 1969, while Michael Collins stayed in orbit as command module pilot.","Apollo 11 carried three astronauts to the Moon, but only two of them set foot on it. NASA's mission overview names the crew as Commander Neil Armstrong, Command Module Pilot Michael Collins and Lunar Module Pilot Edwin ""Buzz"" Aldrin. On July 20, 1969, Armstrong and Aldrin flew the lunar module Eagle down to the surface. Armstrong stepped onto the Moon first, and about 20 minutes later Aldrin followed him. Collins had a different job. He piloted the command and service module, Columbia, which stayed in lunar orbit, and the other two returned to it after leaving the surface. So the answer to how many people walked on the Moon during the first landing is two, even though the crew numbered three.",History,history,https://factfusionai.com/fact/only-two-of-the-three-apollo-11-astronauts-walked-on-the-moon/,NASA,https://www.nasa.gov/history/apollo-11-mission-overview/,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
14,14,"Voyager 1 Is the Farthest Human-Made Object From Earth","What is the farthest human-made object from Earth?","Voyager 1, launched on September 5, 1977, is the farthest human-made object from Earth and in August 2012 became the first spacecraft to enter interstellar space.","Voyager 1. NASA says no spacecraft has gone farther, and that it entered interstellar space in August 2012.","The most distant thing people have ever built is a spacecraft launched in the 1970s. NASA states that no spacecraft has gone farther than Voyager 1, which left Earth on September 5, 1977. On August 25, 2012, it became the first spacecraft to exit the heliosphere and begin measuring the interstellar environment. NASA also gives a distance. As of August 21, 2024, Voyager 1 was 164.7 astronomical units from Earth, which NASA calls the farthest object created by humans. An astronomical unit is a measure of distance used for the solar system. The distance carries a date because the spacecraft is still travelling, so any figure for how far away it is goes out of date and has to be updated.",Technology,technology,https://factfusionai.com/fact/voyager-1-is-the-farthest-human-made-object-from-earth/,NASA,https://science.nasa.gov/mission/voyager/voyager-1/,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
15,15,"Lightning Is About Five Times Hotter Than the Sun's Surface","Is lightning hotter than the Sun?","Lightning can heat the air it passes through to 50,000 degrees Fahrenheit, about five times hotter than the surface of the Sun.","Yes. The US National Weather Service says lightning can heat the air it passes through to 50,000 degrees Fahrenheit, five times hotter than the Sun's surface.","Lightning is far hotter than most people would guess. The US National Weather Service states that lightning can heat the air it passes through to 50,000 degrees Fahrenheit, which it describes as five times hotter than the surface of the Sun. Two details in that sentence are worth noticing. First, the temperature refers to the air along the path of the lightning, which is what the flash heats. Second, the comparison is with the surface of the Sun, not with the Sun as a whole. The inside of the Sun is very much hotter than its surface. NASA gives the temperature of the Sun's core as about 27 million degrees Fahrenheit, so the claim would not hold for the core.",Science,science,https://factfusionai.com/fact/lightning-is-about-five-times-hotter-than-the-surface-of-the-sun/,"National Weather Service",https://www.weather.gov/safety/lightning-temperature,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
16,16,"General Sherman Is the World's Largest Tree by Volume","What is the largest tree in the world by volume?","The General Sherman Tree in Sequoia National Park is the largest tree in the world by volume, estimated at 52,500 cubic feet (1,486.6 cubic meters).","The General Sherman Tree, a giant sequoia in California. The US National Park Service estimates its volume at 52,500 cubic feet.","There is more than one way to rank a tree as the biggest. It can be the tallest, the widest or the one containing the most wood. The US National Park Service describes the General Sherman Tree, in Sequoia and Kings Canyon National Parks, as the largest tree in the world by volume. The park service estimates that volume at 52,500 cubic feet, or 1,486.6 cubic meters. It also lists the tree's height above its base as 274.9 feet, or 83.8 meters. The words by volume are doing real work in the claim. General Sherman is not presented as the tallest tree in the world. Its record is for the total amount of space its trunk takes up.",Nature,nature,https://factfusionai.com/fact/the-general-sherman-tree-is-the-largest-tree-in-the-world-by-volume/,"U.S. National Park Service",https://www.nps.gov/seki/learn/nature/sherman.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
17,17,"A Coast Redwood Can Grow 367 Feet From a Tiny Seed","How tall can a redwood tree grow?","California's coast redwood may grow to a height of 367 feet (112 meters) from a seed no bigger than a tomato seed, and can reach an age of 2,000 years.","Up to 367 feet (112 meters), according to the US National Park Service, starting from a seed no bigger than a tomato seed.","The coast redwood starts small. The US National Park Service says that from a seed no bigger than one from a tomato, California's coast redwood, Sequoia sempervirens, may grow to a height of 367 feet, or 112 meters. The same tree can have a width of 22 feet, or 7 meters, at its base. Growth on that scale takes a very long time. According to the park service, coast redwoods can reach ages of 2,000 years and regularly reach 600 years. The word may is important in the claim. The figure of 367 feet is the height a coast redwood can reach, and it is not the height of a typical tree in the forest.",Nature,nature,https://factfusionai.com/fact/a-coast-redwood-can-grow-to-367-feet-from-a-seed-the-size-of-a-tomato-seed/,"U.S. National Park Service",https://www.nps.gov/redw/learn/nature/about-the-trees.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
18,18,"Bananas Are Slightly Radioactive","Are bananas radioactive?","Bananas are slightly radioactive because a small fraction of the potassium they contain is radioactive, but the amount is far too small to be harmful.","Yes, very slightly. The US Environmental Protection Agency says one banana delivers about 0.01 millirem of radiation, which poses no risk.","Bananas are radioactive, but only in a technical sense. The US Environmental Protection Agency explains that bananas are a good source of potassium, and that a small fraction of all potassium is radioactive. Eating one banana delivers a total dose of 0.01 millirem, or 0.1 microsieverts, of radiation. The agency calls this a very small amount. To put it in proportion, the EPA says a person would need to eat about 100 bananas to receive the same exposure they get each day in the United States from natural radiation in the environment. Its conclusion is direct: because the amount of radiation is very small, these foods do not pose a radiation risk.",Food,food,https://factfusionai.com/fact/bananas-are-slightly-radioactive/,"U.S. Environmental Protection Agency",https://www.epa.gov/radtown/natural-radioactivity-food,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
19,19,"Chimborazo, Not Everest, Is Farthest From Earth's Center","What is the farthest point from Earth's center?","The summit of Mount Chimborazo in Ecuador is the point on Earth's surface farthest from the planet's center, over 2,072 meters farther out than the peak of Mount Everest.","Mount Chimborazo in Ecuador. Everest is higher above sea level, but Chimborazo's summit is over 2,072 meters farther from Earth's center.","Mount Everest is the highest mountain above sea level, but sea level is not the only way to measure height. NOAA's National Ocean Service explains that Earth is not a perfect sphere. It is a bit thicker at the Equator, because of the centrifugal force created by the planet's constant rotation. Mount Chimborazo in Ecuador sits just one degree south of the Equator, where that bulge is greatest. Its summit is 6,268 meters above sea level, well below Everest's 8,848 meters. Measured from the center of the Earth, however, Chimborazo's summit is over 2,072 meters farther out than Everest's peak. NOAA describes this as making Chimborazo the closest point on Earth to the stars.",Geography,geography,https://factfusionai.com/fact/mount-chimborazo-not-everest-is-the-farthest-point-from-earths-center/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/highestpoint.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
20,20,"Babies Are Born With About 300 Bones, but Adults Have 206","How many bones is a baby born with?","A baby is born with about 300 bones, many of which fuse together as the child grows to form the 206 bones that adults have.","About 300. Many of a baby's bones grow together over time, leaving the 206 bones of an adult, according to the US National Institutes of Health.","People do not keep the same number of bones for life. A teaching resource from the National Institute of Arthritis and Musculoskeletal and Skin Diseases, part of the US National Institutes of Health, states that a baby is born with about 300 bones. Many of them eventually fuse, meaning they grow together, to form the 206 bones that adults have. The explanation for the difference is in that word fuse. Bones are not lost along the way. Instead, pieces that start out separate join up, so that what was counted as several bones in a baby is counted as one in an adult. The figure for babies is given as about 300, an approximate number, while the adult figure of 206 is exact.","Human Body",human-body,https://factfusionai.com/fact/babies-are-born-with-about-300-bones-but-adults-have-206/,"National Institutes of Health (NIAMS)",https://www.niams.nih.gov/health-topics/educational-resources/health-lesson-learning-about-bones,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
21,21,"Mercury Is the Fastest Planet in the Solar System","What is the fastest planet in the solar system?","Mercury is the fastest planet in our solar system, circling the Sun once every 88 Earth days.","Mercury. NASA says it zips around the Sun every 88 Earth days, faster than any other planet.","Mercury holds more than one record. NASA describes it as the smallest planet in our solar system and the one nearest to the Sun, only slightly larger than Earth's Moon. It is also the fastest. According to NASA, Mercury zips around the Sun every 88 Earth days, so a year there lasts less than three Earth months. The name fits, because NASA notes that Mercury is named for the swiftest of the ancient Roman gods. One thing Mercury is not is the hottest planet. Despite its position closest to the Sun, that title belongs to nearby Venus, which NASA puts down to the dense atmosphere of Venus. Being nearest to the Sun and being hottest turn out to be two different things.",Space,space,https://factfusionai.com/fact/mercury-is-the-fastest-planet-in-the-solar-system/,"NASA | NASA Planetary Fact Sheet","https://science.nasa.gov/mercury/facts/ | https://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
22,22,"Neptune Is the Only Planet You Cannot See With the Naked Eye","Can you see Neptune with the naked eye?","Neptune is the only planet in our solar system that is not visible to the naked eye.","Neptune. NASA says it is the only planet in our solar system not visible to the naked eye. It is more than 30 times as far from the Sun as Earth.","Several planets can be seen in the night sky without a telescope. Neptune is the exception. NASA states that Neptune is the only planet in our solar system not visible to the naked eye. The reason is distance. Neptune is more than 30 times as far from the Sun as Earth, far enough that, in NASA's words, high noon on the planet would seem like dim twilight to us. That distance also makes for a very long year. Neptune takes about 165 Earth years to complete one orbit of the Sun. It was discovered in 1846, and NASA notes that in 2011 it completed its first full orbit since that discovery.",Space,space,https://factfusionai.com/fact/neptune-is-the-only-planet-you-cannot-see-with-the-naked-eye/,"NASA | NASA","https://www.nasa.gov/image-article/discovering-neptune/ | https://science.nasa.gov/neptune/neptune-facts/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
23,23,"Uranus Is Tilted Almost Completely on Its Side","Why is Uranus tilted on its side?","Uranus is tilted 97.77 degrees, making it the only planet whose equator is nearly at a right angle to its orbit.","Yes. NASA gives the tilt of Uranus as 97.77 degrees, which puts its equator nearly at a right angle to its orbit.","Every planet is tilted to some degree, but Uranus is in a class of its own. NASA states that Uranus is the only planet whose equator is nearly at a right angle to its orbit, with a tilt of 97.77 degrees. A tilt of 90 degrees would mean a planet lying exactly on its side, and Uranus is tipped slightly beyond that. NASA says this may be the result of a collision with an Earth-sized object long ago. The word may matters, since it is offered as a possible explanation and not as a settled fact. The tilt has consequences. According to NASA, it causes Uranus to have the most extreme seasons in the solar system. Those seasons are long as well, because Uranus takes about 84 Earth years to orbit the Sun.",Space,space,https://factfusionai.com/fact/uranus-is-tilted-almost-completely-on-its-side/,"NASA | NASA Planetary Fact Sheet","https://science.nasa.gov/uranus/facts/ | https://nssdc.gsfc.nasa.gov/planetary/factsheet/uranusfact.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
24,24,"Pluto Is Only About Half as Wide as the United States","How big is Pluto compared to the United States?","Pluto is only about 1,400 miles wide, about half the width of the United States and about two-thirds the diameter of Earth's Moon.","Pluto is about 1,400 miles wide. NASA compares that to about half the width of the United States, or two-thirds the diameter of Earth's Moon.","Pluto is small enough that everyday comparisons work. NASA states that Pluto is only about 1,400 miles wide, and that at that size it is only about half the width of the United States. Compared with a more familiar object in the sky, NASA says Pluto is about two-thirds the diameter of Earth's Moon. It is lighter than its size suggests, too. Because of its lower density, Pluto's mass is about one-sixth that of the Moon. NASA gives a few other figures. Pluto is about 3.6 billion miles from the Sun, its average temperature is minus 387 degrees Fahrenheit, or minus 232 degrees Celsius, and it has a thin atmosphere composed mostly of nitrogen, methane and carbon monoxide.",Space,space,https://factfusionai.com/fact/pluto-is-only-about-half-as-wide-as-the-united-states/,"Johns Hopkins University | NASA","https://hub.jhu.edu/2015/07/13/how-big-is-pluto | https://science.nasa.gov/dwarf-planets/pluto/facts/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
25,25,"Sunlight Takes More Than Eight Minutes to Reach Earth","How long does it take sunlight to reach Earth?","Light from the Sun takes about 8 minutes and 20 seconds to reach Earth, across an average distance of about 93 million miles.","Sunlight takes about 8 minutes and 20 seconds to reach Earth, the Smithsonian's National Air and Space Museum says. NASA rounds it to about eight minutes. The average distance is about 93 million miles (150 million kilometers).","The travel time follows from two known numbers: how far away the Sun is and how fast light moves. NASA says Earth sits an average of 93 million miles, or 150 million kilometers, from the Sun. That distance is one astronomical unit. The Smithsonian's National Air and Space Museum gives the speed of light as about 670,600,000 miles per hour. Over the average distance, that means a photon takes about 8 minutes and 20 seconds to travel from the Sun to Earth. NASA's Earth facts page rounds this to about eight minutes. Because of this delay, we always see the Sun as it was a little over eight minutes ago. The exact time changes slightly through the year, because Earth's orbit is not a perfect circle.",Space,space,https://factfusionai.com/fact/sunlight-takes-more-than-eight-minutes-to-reach-earth/,"NASA | Smithsonian National Air and Space Museum","https://science.nasa.gov/earth/facts/ | https://howthingsfly.si.edu/ask-an-explainer/how-long-does-it-take-light-sun-get-earth","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
26,26,"Astronauts on the Space Station See 16 Sunrises a Day","How many sunrises do astronauts see a day?","The International Space Station orbits Earth about every 90 minutes, so in 24 hours its crew travels through 16 sunrises and sunsets.","Sixteen. NASA says the station makes 16 orbits of Earth in 24 hours, passing through 16 sunrises and sunsets.","On Earth there is one sunrise a day. On the International Space Station there are sixteen. NASA explains that the crew live and work while travelling at a speed of five miles per second, orbiting Earth about every 90 minutes. In 24 hours, the station makes 16 orbits of Earth, travelling through 16 sunrises and sunsets. Each lap takes the station through daylight and then through darkness, which is why sunrises come so often. People have been living with that rhythm for a long time. According to NASA, the space station has been continuously occupied since November 2000. NASA describes an international crew of seven people on board, and says the station is operated by five space agencies from 15 countries.",Technology,technology,https://factfusionai.com/fact/astronauts-on-the-space-station-see-16-sunrises-a-day/,NASA,https://www.nasa.gov/international-space-station/space-station-facts-and-figures/,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
27,27,"The Hubble Space Telescope Circles Earth Every 95 Minutes","How fast does Hubble orbit Earth?","The Hubble Space Telescope travels at about 17,000 miles per hour and makes one revolution around Earth every 95 minutes.","About every 95 minutes. NASA gives Hubble's orbital speed as about 17,000 miles per hour, at an altitude of approximately 300 miles.","The Hubble Space Telescope does not sit still above the Earth. NASA states that Hubble is in low-Earth orbit, making one revolution around Earth every 95 minutes. Its orbital speed is about 17,000 miles per hour, or 27,000 kilometers per hour, at an altitude of approximately 300 miles, or 483 kilometers. The telescope itself is large. NASA describes Hubble as the size of a large school bus, weighing 27,000 pounds, or 12,200 kilograms. Those laps add up. NASA's figures show more than 195,000 orbits of Earth and more than 5 billion miles travelled. The height is the point of the exercise: from above the atmosphere, NASA says, Hubble gets a clearer and higher resolution view of the cosmos than ground-based observatories.",Technology,technology,https://factfusionai.com/fact/the-hubble-space-telescope-circles-earth-every-95-minutes/,NASA,https://science.nasa.gov/mission/hubble/overview/hubble-by-the-numbers/,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
28,28,"Webb Has the Largest Mirror Ever Launched Into Space","How big is the Webb telescope mirror?","The James Webb Space Telescope's primary mirror is 6.5 meters (21 feet 4 inches) across, the largest mirror ever launched into space.","It is 6.5 meters, or 21 feet 4 inches, across. NASA says Webb's primary mirror is the largest ever launched into space.","A telescope's power depends heavily on the size of its mirror. NASA states that the primary mirror of the James Webb Space Telescope is 6.5 meters, or 21 feet 4 inches, across, and that it is the largest ever launched into space. Engineers determined that this size was needed to measure the light from extremely distant galaxies. A mirror that big created a problem, because it is larger than the diameter of the rocket that carried it. NASA explains that the mirror is therefore segmented and designed to fold for launch. It is made of 18 hexagonal segments, each 1.32 meters across. The segments are made of beryllium, and each has a very thin coating of gold, which improves the mirror's reflection of infrared light.",Technology,technology,https://factfusionai.com/fact/the-webb-telescope-has-the-largest-mirror-ever-launched-into-space/,NASA,https://science.nasa.gov/mission/webb/webbs-mirrors/,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
29,29,"Sperm Whales Are the Largest Toothed Whales","What is the largest toothed whale?","Sperm whales are the largest of the toothed whales, and they hunt on deep dives that routinely reach 2,000 feet and can last 45 minutes.","The sperm whale. NOAA Fisheries says it is the largest of the toothed whales and routinely dives to 2,000 feet to hunt.","Whales fall into two broad groups, those with teeth and those without. NOAA Fisheries states that sperm whales are the largest of the toothed whales. They are also some of the most widespread animals in the sea. According to NOAA, sperm whales have one of the widest global distributions of any marine mammal species and are found in all deep oceans, from the equator to the edge of the pack ice in the Arctic and Antarctic. Their feeding takes them a long way down. NOAA says sperm whales hunt for food during deep dives that routinely reach depths of 2,000 feet and can last for 45 minutes. After long, deep dives, the whales come to the surface to breathe and recover for several minutes before diving again.",Animal,animal,https://factfusionai.com/fact/sperm-whales-are-the-largest-toothed-whales/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/sperm-whale,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
30,30,"The Leatherback Is the Largest Turtle in the World","What is the largest turtle in the world?","The leatherback sea turtle is the largest turtle in the world and the only species of sea turtle that lacks scales and a hard shell.","The leatherback sea turtle. NOAA Fisheries says it is the largest turtle in the world and the only sea turtle without scales or a hard shell.","Most turtles are easy to recognise by their hard shells. The leatherback is the exception, and it is also the biggest. NOAA Fisheries states that the leatherback sea turtle is the largest turtle in the world, and that leatherbacks are the only species of sea turtle that lack scales and a hard shell. They are named for their tough, rubbery skin. NOAA adds that they have existed in their current form since the age of the dinosaurs. Leatherbacks are remarkable travellers and divers. They are highly migratory, with some swimming over 10,000 miles a year between nesting and foraging grounds. According to NOAA, the deepest recorded dive by a leatherback reached nearly 4,000 feet.",Animal,animal,https://factfusionai.com/fact/the-leatherback-is-the-largest-turtle-in-the-world/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/leatherback-turtle,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
31,31,"The Killer Whale Is the Largest Dolphin","Is a killer whale a dolphin?","The killer whale, or orca, is the largest member of the dolphin family.","Yes. NOAA Fisheries says the killer whale is the largest member of the Delphinidae family, the dolphins.","The name is misleading. NOAA Fisheries states that the killer whale, also known as the orca, is the largest member of the Delphinidae family, or dolphins. That family includes all dolphin species, along with some larger animals whose common names also contain the word whale instead of dolphin. NOAA gives long-finned and short-finned pilot whales as examples. So the killer whale is, by family, a dolphin with whale in its name. NOAA also describes it as the ocean's top predator. Killer whales are found in every ocean in the world, and NOAA calls them the most widely distributed of all cetaceans, the group that takes in whales and dolphins. Scientific studies have identified many different populations around the world.",Animal,animal,https://factfusionai.com/fact/the-killer-whale-is-the-largest-dolphin/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/killer-whale,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
32,32,"Male Seahorses Get Pregnant and Give Birth","Do male seahorses give birth?","Seahorses and their close relatives, sea dragons, are the only species in which the male gets pregnant and gives birth.","Yes. NOAA says seahorses and sea dragons are the only species in which the male gets pregnant and gives birth.","In almost every animal that carries its young, the female does the carrying. Seahorses reverse the arrangement. NOAA's National Ocean Service states that seahorses and their close relatives, sea dragons, are the only species in which the male gets pregnant and gives birth, and calls this a unique adaptation in the animal kingdom. NOAA describes how it works. After a courtship dance that may go on for hours or days, the female seahorse transfers her mature eggs into the male's brood pouch, where they are fertilized. The pregnancy that follows usually lasts from two to four weeks. At the end of it, strong muscular contractions in the male eject the young. NOAA notes that seahorses are members of the pipefish family.",Weird,weird,https://factfusionai.com/fact/male-seahorses-get-pregnant-and-give-birth/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/seahorse.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
33,33,"Starfish Are Not Fish and Have No Blood","Are starfish fish?","Sea stars, commonly called starfish, are not fish: they have no gills, scales or fins, and they use sea water instead of blood to pump nutrients through their bodies.","No. NOAA says sea stars are not fish. They have no gills, scales or fins, and sea water does the job of blood in their bodies.","The common name gets it wrong. NOAA's National Ocean Service states that sea stars, commonly called starfish, are not fish. They live underwater, but in NOAA's words that is where their resemblance to fish ends. Sea stars do not have gills, scales or fins. Their insides are even less fish-like. According to NOAA, sea water, instead of blood, is used to pump nutrients through their bodies by way of what is called a water vascular system. They get around differently too, moving on tiny tube feet located on the underside of their bodies. NOAA says there are approximately 2,000 species of sea star, all of which live in marine waters, and that sea stars live only in saltwater.",Weird,weird,https://factfusionai.com/fact/starfish-are-not-fish-and-have-no-blood/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/starfish.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
34,34,"Corals Are Animals, Not Plants","Is coral an animal or a plant?","Corals are animals, not plants: most coral structures are made up of hundreds to thousands of tiny creatures called polyps.","Animals. NOAA describes coral as a sessile animal, and says most coral structures are made of hundreds to thousands of tiny polyps.","Coral stays in one place and can look like a rock or a plant, which is why the question comes up. NOAA's National Ocean Service answers it directly: corals are sessile animals, meaning animals that stay fixed in place. They take root on the ocean floor, but they are not plants. What we call a coral is usually a crowd. NOAA explains that most coral structures are made up of hundreds to thousands of tiny coral creatures called polyps. Each soft-bodied polyp, most no thicker than a nickel, secretes a hard outer skeleton of limestone, or calcium carbonate. Plants do come into the story. NOAA says coral relies on its relationship with plant-like algae to build the largest structures of biological origin on Earth.",Weird,weird,https://factfusionai.com/fact/corals-are-animals-not-plants/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/coral.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
35,35,"About Half of Earth's Oxygen Comes From the Ocean","How much of Earth's oxygen comes from the ocean?","Scientists estimate that roughly half of the oxygen production on Earth comes from the ocean, mostly from tiny photosynthetic plankton.","About half. NOAA says roughly half of Earth's oxygen production comes from the ocean, mainly from plankton.","Forests usually get the credit for the oxygen we breathe, but the sea does a comparable share of the work. NOAA's National Ocean Service states that scientists estimate roughly half of the oxygen production on Earth comes from the ocean. The majority of it is produced by oceanic plankton, which NOAA describes as drifting plants, algae and some bacteria that can photosynthesize. One of them stands out. Prochlorococcus is the smallest photosynthetic organism on Earth, yet NOAA says this bacteria produces up to 20 percent of the oxygen in the entire biosphere, a higher percentage than all of the tropical rainforests on land combined. There is a catch. NOAA notes that about the same amount of oxygen is consumed by marine life.",Ocean,ocean,https://factfusionai.com/fact/about-half-of-earths-oxygen-comes-from-the-ocean/,"NOAA National Ocean Service | NOAA Ocean Exploration","https://oceanservice.noaa.gov/facts/ocean-oxygen.html | https://oceanexplorer.noaa.gov/ocean-fact/oceanproduction/","A | A",90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
36,36,"Seawater Is About 3.5 Percent Salt","How salty is the ocean?","About 3.5 percent of the weight of seawater comes from dissolved salts, which come mainly from rocks on land and openings in the seafloor.","About 3.5 percent by weight. NOAA says ocean salt comes primarily from rocks on land and openings in the seafloor.","Everyone knows the sea is salty, but the amount can be stated exactly. NOAA's National Ocean Service gives the average salinity of the ocean as about 35 parts per thousand. Stated another way, about 3.5 percent of the weight of seawater comes from the dissolved salts. NOAA also explains where the salt comes from. Ocean salt primarily comes from rocks on land and from openings in the seafloor. The figure of 3.5 percent is an average, and the sea is not equally salty everywhere. According to NOAA, salinity is generally low at the equator and at the poles, and high at mid-latitudes. So how salty a sample of seawater is depends partly on where in the world it was collected.",Ocean,ocean,https://factfusionai.com/fact/seawater-is-about-3-5-percent-salt/,"NOAA National Ocean Service | U.S. Geological Survey","https://oceanservice.noaa.gov/facts/whysalty.html | https://www.usgs.gov/faqs/why-ocean-salty","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
37,37,"Tsunami Waves Can Travel as Fast as a Jet Plane","How fast can a tsunami travel?","Over deep water, tsunami waves may travel as fast as jet planes, slowing down only when they reach shallow water.","As fast as a jet plane over deep water, according to NOAA. They slow down only when they reach shallow water.","A tsunami crossing the open ocean is extremely fast. NOAA's National Ocean Service states that tsunami waves may travel as fast as jet planes over deep waters, only slowing down when reaching shallow waters. The speed is tied to depth. According to NOAA, the speed of tsunami waves depends on ocean depth and not on the distance from the source of the wave. That is why the waves slow as the sea floor rises towards a coast. NOAA also corrects a common name. Tsunamis are often referred to as tidal waves, but this name is discouraged by oceanographers, because tides have little to do with these giant waves. A tsunami and a tide are different things with different causes.",Ocean,ocean,https://factfusionai.com/fact/tsunami-waves-can-travel-as-fast-as-a-jet-plane/,"NOAA National Ocean Service | NOAA National Weather Service","https://oceanservice.noaa.gov/facts/tsunami.html | https://www.noaa.gov/jetstream/tsunamis/tsunami-propagation","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
38,38,"Earth's Longest Mountain Range Is Mostly Under the Ocean","What is the longest mountain range on Earth?","The longest mountain range on Earth is the mid-ocean ridge, which spans 40,389 miles around the globe, with about 90 percent of it under the ocean.","The mid-ocean ridge. NOAA says it spans 40,389 miles around the globe and that about 90 percent of it is under the ocean.","The longest mountain range on the planet is one that most people will never see. NOAA's National Ocean Service states that the longest mountain range on Earth is the mid-ocean ridge, spanning 40,389 miles around the globe. About 90 percent of the mid-ocean ridge system is under the ocean, which is why it is so little known compared with ranges on land. NOAA offers a helpful picture of its shape. The system of mountains and valleys criss-crosses the globe, resembling the stitches in a baseball. It is not a single straight line of peaks but a connected network that wraps around the Earth. According to NOAA, the ridge is formed by the movement of the Earth's tectonic plates.",Geography,geography,https://factfusionai.com/fact/the-longest-mountain-range-on-earth-is-mostly-under-the-ocean/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/midoceanridge.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
39,39,"The Grand Canyon Is 278 River Miles Long and a Mile Deep","How big is the Grand Canyon?","The Grand Canyon is 278 river miles long, up to 18 miles wide from rim to rim, and one mile deep on average.","It is 278 river miles long, up to 18 miles wide and a mile deep on average, according to the US National Park Service.","The Grand Canyon is hard to take in, so the numbers help. The US National Park Service lists the canyon's length as 278 river miles, or 447 kilometers. Its width varies a great deal along the way. The narrowest point is at Marble Canyon, at 600 feet. The average distance from rim to rim is 10 miles, and the maximum is 18 miles. The depth is given as one mile on average. The two rims are not level with each other. The park service puts the average elevation of the South Rim at 7,000 feet and that of the North Rim at 8,000 feet. Grand Canyon National Park as a whole covers 1,904 square miles, and the park service gives the canyon's volume as 5.45 trillion cubic yards.",Geography,geography,https://factfusionai.com/fact/the-grand-canyon-is-278-river-miles-long-and-a-mile-deep/,"U.S. National Park Service",https://www.nps.gov/grca/learn/management/statistics.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
40,40,"The Hottest Air Temperature on Record Was in Death Valley","What is the hottest temperature ever recorded?","The world record highest air temperature, 134°F (57°C), was recorded at Furnace Creek in Death Valley on July 10, 1913.","It was 134°F (57°C), recorded at Furnace Creek in Death Valley, California, on July 10, 1913, according to the US National Park Service.","Death Valley has a reputation, and the record books back it up. The US National Park Service states that the world record highest air temperature of 134 degrees Fahrenheit, or 57 degrees Celsius, was recorded at Furnace Creek on July 10, 1913. The park service describes Death Valley as famous for being the hottest place on earth and the driest place in North America. The record is extreme, but ordinary summers there are severe too. Summer temperatures often top 120 degrees Fahrenheit, or 49 degrees Celsius, in the shade, with overnight lows dipping only into the 90s. Rain is scarce. According to the park service, average rainfall in Death Valley is less than 2 inches, or 5 centimeters, a year.",Nature,nature,https://factfusionai.com/fact/the-hottest-air-temperature-ever-recorded-was-in-death-valley/,"U.S. National Park Service",https://www.nps.gov/deva/learn/nature/weather-and-climate.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
41,41,"Mammoth Cave Is the Longest Known Cave System in the World","What is the longest cave system in the world?","Mammoth Cave in Kentucky is the world's longest known cave system.","Mammoth Cave, in Kentucky. The US National Park Service describes it as the world's longest known cave system.","The longest cave system anyone has found is under the hills of Kentucky. The US National Park Service describes Mammoth Cave National Park as a place of rolling hills, deep river valleys, and the world's longest known cave system. One word in that description deserves attention, and it is known. A cave system can only be measured as far as people have explored it, so the title belongs to the longest system discovered so far and leaves room for more to be found. The park is valued for more than its length. According to the park service, it is home to thousands of years of human history and a rich diversity of plant and animal life, and it has been recognised as a UNESCO World Heritage Site.",Nature,nature,https://factfusionai.com/fact/mammoth-cave-is-the-longest-known-cave-system-in-the-world/,"U.S. National Park Service",https://www.nps.gov/maca/index.htm,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
42,42,"Skin Is the Biggest Organ of the Human Body","What is the largest organ of the human body?","Skin is the biggest organ of the human body, and it is organized into three main layers.","The skin. The US National Institutes of Health describes skin as the biggest organ of the body, made up of three main layers.","When people think of organs they usually think of the heart or the lungs, but the largest one is on the outside. A teaching resource from the National Institute of Arthritis and Musculoskeletal and Skin Diseases, part of the US National Institutes of Health, states that skin is the biggest organ of your body. It explains that an organ is a part of the body that has a specific job, and skin has several. It covers and protects you, fights dangerous germs and stops them from getting inside the body, and makes melanin, the molecule that gives skin its color. Skin is organized into three main layers. The epidermis is the part you can see, and at the bottom of it new skin cells form to replace old ones that flake off.","Human Body",human-body,https://factfusionai.com/fact/skin-is-the-biggest-organ-of-the-human-body/,"National Institutes of Health (NIAMS)",https://www.niams.nih.gov/health-topics/educational-resources/health-lesson-learning-about-skin,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
43,43,"The Human Brain Weighs About Three Pounds","How much does the human brain weigh?","The human brain is a three-pound organ, described by the US National Institutes of Health as the most complex part of the human body.","About three pounds. The US National Institutes of Health calls this three-pound organ the most complex part of the human body.","For something that does so much, the brain does not weigh a great deal. The National Institute of Neurological Disorders and Stroke, part of the US National Institutes of Health, describes the brain as a three-pound organ and as the most complex part of the human body. The institute sums up its work in a single sentence. The brain is the seat of intelligence, the interpreter of the senses, the initiator of body movement and the controller of behavior. That covers thinking, seeing and hearing, moving, and how a person acts. The institute also describes where the brain sits: lying in its bony shell and washed by protective fluid. It calls the brain the source of all the qualities that define our humanity.","Human Body",human-body,https://factfusionai.com/fact/the-human-brain-weighs-about-three-pounds/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-know-your-brain,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
44,44,"Your Heart Is About the Size of Your Fist","How big is the human heart?","The human heart is an organ about the size of your fist that pumps blood through your body.","About the size of your fist, according to the US National Heart, Lung, and Blood Institute.","You can get a rough idea of the size of your own heart by looking at your hand. The National Heart, Lung, and Blood Institute, part of the US National Institutes of Health, describes the heart as an organ about the size of your fist that pumps blood through your body. The comparison is to your own fist, so it scales with the person, and it is an approximation and not a measurement. The institute explains that the heart is made up of multiple layers of tissue and sits at the center of the circulatory system. That system is a network of blood vessels, such as arteries, veins and capillaries, that carries blood around the body. The heart is the pump that keeps the blood in that network moving.","Human Body",human-body,https://factfusionai.com/fact/your-heart-is-about-the-size-of-your-fist/,"National Institutes of Health (NHLBI)",https://www.nhlbi.nih.gov/health/heart,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
45,45,"Lindbergh's New York to Paris Flight Took 33.5 Hours","How long was Lindbergh's flight to Paris?","Charles Lindbergh's solo flight from New York to Paris in May 1927 took 33 hours and 30 minutes and covered 3,610 miles.","Thirty-three hours and 30 minutes. Lindbergh took off alone on May 20, 1927, and landed near Paris 3,610 miles later.","In 1927 nobody had flown nonstop between New York and Paris, and a prize was waiting for the first to do it. The Smithsonian's National Air and Space Museum, which holds the aircraft, records that Raymond Orteig had offered $25,000 in 1919 for the first nonstop flight between the two cities. Charles Lindbergh competed for it in a Ryan monoplane named the Spirit of St. Louis. According to the museum, he took off for Paris alone on the morning of May 20, 1927. Thirty-three hours, 30 minutes and 3,610 miles later he landed safely at Le Bourget Field, near Paris, where he was greeted by a wildly enthusiastic crowd of 100,000. The museum describes it as an extraordinary solo transatlantic flight.",History,history,https://factfusionai.com/fact/lindberghs-flight-from-new-york-to-paris-took-33-and-a-half-hours/,"Smithsonian National Air and Space Museum",https://airandspace.si.edu/collection-objects/ryan-nyp-spirit-st-louis-charles-lindbergh/nasm_A19280021000,B,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-03,yes
46,46,"The First Flight Faster Than Sound Was on October 14, 1947","When was the sound barrier first broken?","On October 14, 1947, the Bell X-1, piloted by Chuck Yeager, became the first airplane to fly faster than the speed of sound.","On October 14, 1947. The Bell X-1, flown by US Air Force Capt. Charles ""Chuck"" Yeager, reached Mach 1.06.","The sound barrier was first broken in 1947, by an aircraft that carried a personal name. The Smithsonian's National Air and Space Museum, which holds the airplane, records that on October 14, 1947, the Bell X-1 became the first airplane to fly faster than the speed of sound. It was piloted by US Air Force Capt. Charles E. ""Chuck"" Yeager. According to the museum, the X-1 reached a speed of 1,127 kilometers, or 700 miles, per hour, which is Mach 1.06, at an altitude of 13,000 meters, or 43,000 feet. It did not take off from a runway. The X-1 was air-launched at 7,000 meters from the bomb bay of a Boeing B-29. Yeager named the airplane Glamorous Glennis in tribute to his wife.",History,history,https://factfusionai.com/fact/the-first-flight-faster-than-sound-was-on-october-14-1947/,"Smithsonian National Air and Space Museum",https://airandspace.si.edu/collection-objects/bell-x-1-glamorous-glennis/nasm_A19510007000,B,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
47,47,"Thunder Can Be Heard Only About 10 Miles Away","How far away can you hear thunder?","Thunder is the sound caused by a nearby flash of lightning, and it can be heard for a distance of only about 10 miles from the strike.","About 10 miles. The US National Weather Service says thunder can be heard only about that far from the lightning strike.","Thunder does not travel as far as people tend to assume. The US National Weather Service states that thunder is the sound caused by a nearby flash of lightning and can be heard for a distance of only about 10 miles from the lightning strike. It also explains where the sound comes from. Thunder is created when lightning passes through the air. The lightning discharge heats the air rapidly and causes it to expand, and immediately after the flash the air cools and contracts quickly. The weather service draws a practical conclusion from the 10-mile figure. If you can hear thunder, the storm is close enough to matter, and the sound should serve as a warning to anyone outside that they are within striking distance.",Science,science,https://factfusionai.com/fact/thunder-can-be-heard-only-about-10-miles-away/,"National Weather Service",https://www.weather.gov/safety/lightning-science-thunder,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
48,48,"People Spend About a Third of Their Time Asleep","How much of our life do we spend asleep?","People spend about one-third of their time sleeping.","About one-third. The US National Institutes of Health says you spend about one-third of your time sleeping.","Sleep takes up a larger share of life than any other single activity. The National Institute of Neurological Disorders and Stroke, part of the US National Institutes of Health, states that sleep is an important part of your daily routine and that you spend about one-third of your time doing it. One-third of a 24-hour day is eight hours, and one-third of a week is more than two full days. The institute is clear that this time is not wasted. It says that quality sleep, and getting enough of it at the right times, is as essential to survival as food and water. Without sleep, according to the institute, you cannot form or maintain the pathways in your brain that let you learn.",Psychology,psychology,https://factfusionai.com/fact/people-spend-about-a-third-of-their-time-asleep/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
49,49,"Everyone Dreams for About Two Hours a Night","How long do we dream each night?","Everyone dreams, spending about two hours each night dreaming, although most dreams are not remembered.","Yes. The US National Institutes of Health says everyone dreams, for about two hours each night, even if most dreams are forgotten.","People sometimes say that they never dream. The National Institute of Neurological Disorders and Stroke, part of the US National Institutes of Health, puts it in two words: everyone dreams. According to the institute, you spend about two hours each night dreaming, but may not remember most of your dreams. That last point explains why some people believe they do not dream at all. The dreaming happens, and the memory of it does not last. As for what dreams are for, the institute is candid. Its exact purpose is not known, although dreaming may help you process your emotions. The institute adds that events from the day often invade your thoughts during sleep.",Psychology,psychology,https://factfusionai.com/fact/everyone-dreams-for-about-two-hours-a-night/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
50,50,"Decaf Coffee Still Contains Caffeine","Does decaf coffee have caffeine?","Decaffeinated coffee is not caffeine-free: an 8-fluid-ounce cup of decaf coffee typically has 2 to 15 milligrams of caffeine.","Yes. The US Food and Drug Administration says an 8-fluid-ounce cup of decaf coffee typically has 2 to 15 milligrams of caffeine.","The word decaffeinated suggests that the caffeine has gone. It has not, entirely. The US Food and Drug Administration says plainly that decaffeinated does not mean caffeine-free. Decaffeinated coffees and teas have less caffeine than their regular counterparts but still contain some. As an example, the agency says decaf coffee typically has 2 to 15 milligrams in an 8-fluid-ounce cup. For comparison, the FDA gives a daily figure for regular caffeine. For most adults it has cited 400 milligrams a day, about two to three 12-fluid-ounce cups of coffee, as an amount not generally associated with negative effects. It adds that there is wide variation in how sensitive people are to caffeine and in how fast they eliminate it from the body.",Food,food,https://factfusionai.com/fact/decaf-coffee-still-contains-caffeine/,"U.S. Food and Drug Administration",https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
51,51,"Venus Is the Hottest Planet in the Solar System","What is the hottest planet in the solar system?","Venus is the hottest planet in our solar system, with a surface temperature of about 872 degrees Fahrenheit (467 degrees Celsius).","Venus. NASA puts its surface at about 872 degrees Fahrenheit (467 Celsius), hot enough to melt lead and hotter than Mercury.","Mercury is closer to the Sun, so it seems the obvious candidate for hottest planet. It is not. NASA states that Venus is the hottest planet in our solar system, with surface temperatures of about 872 degrees Fahrenheit, or 467 degrees Celsius. That is hot enough to melt lead. The reason is the air. According to NASA, the thick atmosphere of Venus traps heat in a runaway greenhouse effect. The atmosphere is mostly carbon dioxide, the same gas that drives the greenhouse effect on Earth, and it holds dense clouds composed of sulfuric acid. NASA adds that Venus has the hottest surface in the solar system apart from the Sun itself, hotter even than Mercury, the innermost planet.",Space,space,https://factfusionai.com/fact/venus-is-the-hottest-planet-in-the-solar-system/,"NASA | NASA Planetary Fact Sheet","https://science.nasa.gov/venus/venus-facts/ | https://nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
52,52,"Jupiter Has the Shortest Day of Any Planet","How long is a day on Jupiter?","Jupiter has the shortest day in the solar system, taking about 9.9 hours to spin once on its axis.","Jupiter. NASA says the largest planet takes only about 9.9 hours to spin around once, the shortest day in the solar system.","The biggest planet is also the quickest spinner. NASA states that Jupiter has the shortest day in the solar system, taking about 9.9 hours to spin around once on its axis. That is less than half an Earth day, on a planet so large that, in NASA's words, 1,000 Earths could fit inside if it were a hollow shell. What a visitor would see spinning past is weather. NASA describes Jupiter's signature stripes and swirls as cold, windy clouds of ammonia and water, floating in an atmosphere of hydrogen and helium. The dark orange stripes are called belts and the lighter bands are called zones, and they flow east and west in opposite directions.",Space,space,https://factfusionai.com/fact/jupiter-has-the-shortest-day-of-any-planet/,"NASA | NASA Planetary Fact Sheet","https://science.nasa.gov/jupiter/jupiter-facts/ | https://nssdc.gsfc.nasa.gov/planetary/factsheet/jupiterfact.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
53,53,"Saturn Has 274 Confirmed Moons, More Than Any Other Planet","How many moons does Saturn have?","As of March 2025, Saturn had 274 confirmed moons, far more than any other planet in our solar system.","274. NASA says that as of March 2025 Saturn had 274 confirmed moons in its orbit, far more than any other planet in our solar system.","Counting moons is a moving target, and Saturn is well ahead. NASA states that as of March 2025, Saturn had 274 confirmed moons in its orbit, far more than any other planet in our solar system. The number is tied to a date for a reason. NASA notes that other Saturnian satellites are continually awaiting confirmation of their discovery and official naming by the International Astronomical Union, so the total can rise. The moons are varied. NASA mentions the haze-shrouded surface of Titan and crater-riddled Phoebe, and says each moon tells another piece of the story of the Saturn system. The planet they circle spins quickly. A day on Saturn takes only 10.7 hours, while a year there lasts about 29.4 Earth years.",Space,space,https://factfusionai.com/fact/saturn-has-274-confirmed-moons-more-than-any-other-planet/,"NASA | University of British Columbia","https://science.nasa.gov/saturn/facts/ | https://news.ubc.ca/2025/03/saturn-128-new-moons/","A | A",90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
54,54,"Saturn's Rings Are Vast but Only About 30 Feet Thick","How thick are Saturn's rings?","Saturn's ring system extends up to 175,000 miles (282,000 kilometers) from the planet, yet the main rings are typically only about 30 feet (10 meters) thick.","About 30 feet. NASA says the rings reach up to 175,000 miles from Saturn, yet their vertical height is typically about 30 feet in the main rings.","Saturn's rings are enormous in one direction and almost nothing in the other. NASA states that the ring system extends up to 175,000 miles, or 282,000 kilometers, from the planet, yet the vertical height is typically about 30 feet, or 10 meters, in the main rings. They are not solid. According to NASA, the rings are made of billions of small chunks of ice and rock coated with other materials such as dust. NASA says they are thought to be pieces of comets, asteroids, or shattered moons that broke up before they reached the planet, torn apart by Saturn's powerful gravity. The main rings are named A, B, and C, and a gap 2,920 miles wide called the Cassini Division separates rings A and B.",Space,space,https://factfusionai.com/fact/saturns-rings-are-vast-but-only-about-30-feet-thick/,"NASA | NASA Photojournal","https://science.nasa.gov/saturn/facts/ | https://science.nasa.gov/photojournal/translucent-arcs","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
55,55,"Mars Is Red Because Its Surface Is Rusty","Why is Mars red?","Mars looks red because iron minerals in the Martian dirt oxidize, or rust.","Rust. NASA says iron minerals in the Martian dirt oxidize, or rust, causing the surface to look red.","The nickname Red Planet is literal. NASA explains that Mars is frequently called the Red Planet because iron minerals in the Martian dirt oxidize, or rust, causing the surface to look red. People noticed the color long before anyone knew the cause. NASA notes that the Egyptians called the planet Her Desher, meaning the red one. NASA's page gives a few other details about the planet. Mars completes one rotation every 24.6 hours, very close to a day on Earth, and Martian days are called sols. A year on Mars lasts 687 Earth days. Mars also has two small moons, Phobos and Deimos, that may be captured asteroids. It is the only planet where rovers have been sent to roam the landscape.",Space,space,https://factfusionai.com/fact/mars-is-red-because-its-surface-is-rusty/,"ESA | NASA","https://esa.int/ESA_Multimedia/Images/2025/02/Why_is_Mars_red | https://science.nasa.gov/mars/facts/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
56,56,"The Moon Always Shows Earth the Same Face","Why do we always see the same side of the Moon?","The Moon rotates at the same rate that it revolves around Earth, so the same hemisphere faces Earth all the time.","Because it spins once for every trip around Earth. NASA calls this synchronous rotation, and it keeps the same hemisphere facing us all the time.","Everyone on Earth sees the same side of the Moon. NASA explains why: the Moon is rotating at the same rate that it revolves around Earth, which is called synchronous rotation, so the same hemisphere faces Earth all the time. The Moon makes a complete orbit around Earth in 27 Earth days and spins once in that same amount of time. NASA describes the Earth and Moon as tidally locked. This does not mean the Moon stands still, only that its spin and its orbit are matched. NASA's page also shows how harsh the surface is. The temperature reaches about 260 degrees Fahrenheit in full Sun and plummets to about minus 280 degrees Fahrenheit in darkness, and the Moon has only a very thin atmosphere called an exosphere.",Space,space,https://factfusionai.com/fact/the-moon-always-shows-earth-the-same-face/,"NASA | NASA (Moon tidal locking)","https://science.nasa.gov/moon/facts/ | https://science.nasa.gov/moon/tidal-locking/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
57,57,"Earth Is the Only Planet Not Named for a Greek or Roman God","Why is Earth not named after a god?","Earth is the only planet in the solar system whose English name does not come from Greek or Roman mythology; the name was taken from Old English and Germanic.","Earth. NASA says it is the only planet whose English name does not come from Greek or Roman mythology. The name was taken from Old English and Germanic.","Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune all carry names from ancient mythology. Earth does not. NASA states that Earth is the only planet in the solar system whose English name does not come from Greek or Roman mythology, and that the name was taken from Old English and Germanic. In NASA's words, all of the planets, except for Earth, were named after Greek and Roman gods and goddesses. NASA's page lists other ways Earth stands apart. It is the only planet in our solar system with liquid water on the surface, and the only planet with only one moon. Earth's global ocean covers about 71 percent of the planet's surface. Earth is, however, only the fifth largest planet in the solar system.",Space,space,https://factfusionai.com/fact/earth-is-the-only-planet-not-named-for-a-greek-or-roman-god/,NASA,https://science.nasa.gov/earth/facts/,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
58,58,"All the Asteroids Together Weigh Less Than the Moon","How much do all the asteroids weigh?","The total mass of all the asteroids combined is less than that of Earth's Moon.","Less than the Moon. NASA says the total mass of all the asteroids combined is less than that of Earth's Moon.","Pictures of the asteroid belt can make it look like a crowded field of giant rocks. The numbers say otherwise. NASA states that the total mass of all the asteroids combined is less than that of Earth's Moon. Most asteroids orbit the Sun between Mars and Jupiter, within the main asteroid belt. They vary a great deal in size. According to NASA, they range from Vesta, the largest asteroid at about 329 miles, or 530 kilometers, in diameter, to much smaller asteroids that are less than 33 feet, or 10 meters, across. Some even have company. NASA notes that more than 150 asteroids are known to have small companion moons of their own.",Space,space,https://factfusionai.com/fact/all-the-asteroids-together-weigh-less-than-the-moon/,"NASA | Southwest Research Institute (NASA Lucy mission)","https://science.nasa.gov/solar-system/asteroids/facts/ | https://lucy.swri.edu/MainBeltDensity.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
59,59,"The Pacific Holds More Than Half of Earth's Free Water","Which ocean holds the most water?","The Pacific Ocean contains more than half of the free water on Earth, and all of the world's continents could fit into its basin.","More than half. NOAA says the Pacific contains more than half of the free water on Earth and that all of the world's continents could fit into its basin.","The Pacific is in a size class of its own. NOAA's National Ocean Service describes it as the largest and deepest of the world ocean basins, containing more than half of the free water on Earth. NOAA puts the scale another way: all of the world's continents could fit into the Pacific basin. It is also the oldest of the existing ocean basins. The edge of the basin is restless. NOAA explains that the Pacific basin is referred to as the Ring of Fire because of intense earthquake and volcanic activity near areas where one tectonic plate is forced under another. The other basins follow in order of size. The Atlantic is second largest, followed by the Indian Ocean basin, the Southern Ocean and finally the Arctic Ocean basin.",Ocean,ocean,https://factfusionai.com/fact/the-pacific-holds-more-than-half-of-earths-free-water/,"NOAA National Ocean Service | NOAA Ocean Exploration","https://oceanservice.noaa.gov/facts/biggestocean.html | https://oceanexplorer.noaa.gov/ocean-fact/pacific-size/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
60,60,"There Is Only One Global Ocean","How many oceans are there in the world?","There is only one global ocean, which covers 71 percent of the Earth and is divided into named regions.","One. NOAA says there is only one global ocean. It is geographically divided into named regions, and most countries now recognize five of them.","Maps show several oceans, but the water is all connected. NOAA's National Ocean Service states that there is only one global ocean, a vast body of water that covers 71 percent of the Earth and is geographically divided into distinct named regions. Historically there are four named oceans: the Atlantic, Pacific, Indian and Arctic. According to NOAA, most countries, including the United States, now recognize the Southern, or Antarctic, as the fifth ocean. NOAA calls the Southern Ocean the newest named ocean. Its boundaries were proposed to the International Hydrographic Organization in 2000, but not all countries agree on them, so they have yet to be ratified. NOAA adds that the boundaries between ocean regions have evolved over time for historical, cultural, geographical and scientific reasons.",Ocean,ocean,https://factfusionai.com/fact/there-is-only-one-global-ocean/,"NOAA National Ocean Service | University of Texas Marine Science Institute","https://oceanservice.noaa.gov/facts/howmanyoceans.html | https://utmsi.utexas.edu/science-and-the-sea/radio-program/one-ocean/","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
61,61,"The World's Largest Waterfall Is Under the Ocean","What is the largest waterfall in the world?","The world's largest waterfall lies beneath the Denmark Strait, between Iceland and Greenland, where cold water plunges nearly two miles.","Under the Denmark Strait, between Iceland and Greenland. NOAA says cold, dense water there drops from 2,000 feet to 10,000 feet below the surface.","The largest waterfall on Earth cannot be seen. NOAA's National Ocean Service states that the world's largest waterfall lies beneath the Denmark Strait, which separates Iceland and Greenland. At the bottom of the strait is a series of cataracts that begin 2,000 feet under the surface and plunge to a depth of 10,000 feet at the southern tip of Greenland, nearly a two-mile drop. A waterfall inside the sea is possible because cold water is denser than warm water. In the Denmark Strait, southward-flowing frigid water from the Nordic Seas meets warmer water from the Irminger Sea. The cold water sinks below the warmer water and flows over the drop in the ocean floor, a downward flow NOAA estimates at well over 123 million cubic feet per second.",Ocean,ocean,https://factfusionai.com/fact/the-worlds-largest-waterfall-is-under-the-ocean/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/largest-waterfall.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
62,62,"The Highest Tides in the World Are in Canada's Bay of Fundy","Where are the highest tides in the world?","The highest tides in the world are found in Canada's Bay of Fundy, at Burntcoat Head in Nova Scotia.","Canada's Bay of Fundy. NOAA says the highest tides in the world are found there, at Burntcoat Head in Nova Scotia.","Tides do not rise by the same amount everywhere. NOAA's National Ocean Service states that the highest tides in the world can be found in Canada's Bay of Fundy, at Burntcoat Head in Nova Scotia. The bay separates New Brunswick from Nova Scotia. For comparison, NOAA says the highest tides in the United States are near Anchorage, Alaska, with tidal ranges that average around 30 feet. Because many places with big tides are far north, people sometimes assume that tides grow with latitude. NOAA calls that a misconception. The larger ranges are created by the positions and shapes of the continents in the northern hemisphere, which constrict the oceans. In the far south, where the continents are not pressed closely together, tidal ranges are not increased.",Ocean,ocean,https://factfusionai.com/fact/the-highest-tides-in-the-world-are-in-canadas-bay-of-fundy/,"NASA Earth Observatory | NOAA National Ocean Service","https://science.nasa.gov/earth/earth-observatory/high-and-low-tides-in-bay-of-fundy-6650/ | https://oceanservice.noaa.gov/facts/highesttide.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
63,63,"Seawater Freezes at About 28.4 Degrees Fahrenheit","At what temperature does seawater freeze?","Seawater freezes at about 28.4 degrees Fahrenheit, lower than the 32 degrees at which fresh water freezes, because of the salt in it.","About 28.4 degrees Fahrenheit. NOAA says seawater freezes at a lower temperature than fresh water, which freezes at 32 degrees, because of the salt in it.","The ocean can freeze, but it has to get colder than a pond does. NOAA's National Ocean Service explains that fresh water freezes at 32 degrees Fahrenheit, while seawater freezes at about 28.4 degrees Fahrenheit because of the salt in it. The ice itself is not very salty. According to NOAA, when seawater freezes the ice contains very little salt, because only the water part freezes. Frozen ocean is far from rare. NOAA says at least 15 percent of the ocean is covered by sea ice for some part of the year. Salt changes how water behaves as it cools, too. Seawater becomes denser and denser right down to its freezing point, whereas fresh water is most dense at 39.2 degrees Fahrenheit, well above its freezing point.",Ocean,ocean,https://factfusionai.com/fact/seawater-freezes-at-about-28-4-degrees-fahrenheit/,"National Snow and Ice Data Center (NSIDC) | NOAA National Ocean Service","https://nsidc.org/learn/parts-cryosphere/sea-ice/science-sea-ice | https://oceanservice.noaa.gov/facts/oceanfreeze.html","A | A",95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
64,64,"There Is Gold Dissolved in the Ocean","Is there gold in the ocean?","Ocean water contains gold, but it is so dilute that one study found only about one gram for every 100 million metric tons of water in the Atlantic and north Pacific.","Yes, but very little. NOAA cites a study that found about one gram of gold for every 100 million metric tons of ocean water in the Atlantic and north Pacific.","Yes, there is gold in the ocean, says NOAA's National Ocean Service, though nobody is getting rich from it. Gold in seawater is so dilute that its concentration is on the order of parts per trillion. NOAA cites one study that found only about one gram of gold for every 100 million metric tons of ocean water in the Atlantic and north Pacific, and adds that it is difficult to say exactly how much gold the ocean holds in total. There is also undissolved gold in and on the seafloor. Reaching it is the problem. NOAA explains that those deposits are a mile or two underwater and encased in rock that must be mined through. Currently, NOAA says, there is no cost-effective way to mine or extract gold from the ocean to make a profit.",Ocean,ocean,https://factfusionai.com/fact/there-is-gold-dissolved-in-the-ocean/,"Huang et al. (2023), Frontiers in Marine Science | NOAA National Ocean Service","https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2023.1147843/full | https://oceanservice.noaa.gov/facts/gold.html","A | A",90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
65,65,"The Greenland Shark Is the Longest-Lived Vertebrate Known","How long do Greenland sharks live?","The Greenland shark is the longest-lived vertebrate known: radiocarbon dating of 28 sharks revealed a life span of at least 272 years.","At least 272 years. A 2016 study in Science dated 28 Greenland sharks and concluded the species is the longest-lived vertebrate known.","How old can a shark get? One team of researchers set out to measure it for the Greenland shark. In a study published in the journal Science in 2016, they used radiocarbon dating on the nuclei of eye lenses from 28 female Greenland sharks, which ranged from 81 to 502 centimeters in length. The results revealed a life span of at least 272 years. The largest animal, at 502 centimeters, was estimated to be 392 years old, give or take 120 years. The sharks also grow up slowly. The study put the age at sexual maturity at no less than 156 years, give or take 22. The authors concluded that the Greenland shark is the longest-lived vertebrate known, and said the results raise concerns about the conservation of the species.",Ocean,ocean,https://factfusionai.com/fact/the-greenland-shark-is-the-longest-lived-vertebrate-known/,"Science (Nielsen et al., 2016) | University of Oxford","https://pubmed.ncbi.nlm.nih.gov/27516602/ | https://www.ox.ac.uk/node/510994","A | A",90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
66,66,"The Gulf Stream Moves More Water Than All the World's Rivers","How much water does the Gulf Stream carry?","The Gulf Stream transports an amount of water greater than that carried by all of the world's rivers combined.","Yes. NOAA says the Gulf Stream transports more water than all of the world's rivers combined, at an average speed of four miles per hour.","The Gulf Stream is a river within the sea, and a very large one. NOAA's National Ocean Service states that the Gulf Stream transports an amount of water greater than that carried by all of the world's rivers combined. NOAA describes it as an intense, warm ocean current in the western North Atlantic Ocean. It moves north along the coast of Florida, turns eastward off North Carolina, and flows northeast across the Atlantic. It is not especially fast. The average speed is four miles per hour, or 6.4 kilometers per hour. The current is fastest near the surface, where the maximum speed is typically about 5.6 miles per hour, and it slows to about one mile per hour as it widens to the north.",Ocean,ocean,https://factfusionai.com/fact/the-gulf-stream-moves-more-water-than-all-the-worlds-rivers/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/gulfstreamspeed.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
67,67,"About 91 Percent of Ocean Species Have Not Been Described","How many ocean species are undiscovered?","A 2011 study estimated that about 2.2 million species live in the ocean and that some 91 percent of them still await description.","About 91 percent, by one estimate. A 2011 study in PLOS Biology predicted about 2.2 million marine species, most of them not yet described by science.","How many kinds of living things are there? In 2011 a team of researchers published an estimate in the peer-reviewed journal PLOS Biology. They noticed that the way species are grouped into larger categories follows a consistent pattern, and used that pattern to predict totals. Their method predicted about 8.7 million species globally, give or take 1.3 million, of which about 2.2 million are marine. Set against the species already catalogued, more than 1.2 million at the time, the results suggested that some 86 percent of existing species on Earth and 91 percent of species in the ocean still await description. This is an estimate, not a count. The authors themselves describe the question as one of the most basic yet elusive in science, and earlier estimates had varied widely.",Ocean,ocean,https://factfusionai.com/fact/about-91-percent-of-ocean-species-have-not-been-described/,"PLOS Biology (Mora et al., 2011)",https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001127,A,85,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-13,yes
68,68,"Bowhead Whales May Live for More Than 200 Years","How long do bowhead whales live?","Evidence suggests that bowhead whales can live for more than 200 years.","Possibly more than 200 years. NOAA Fisheries says their lifespan is unknown, but evidence suggests bowhead whales can live over 200 years.","Nobody knows exactly how long a bowhead whale can live, and NOAA Fisheries lists the lifespan as unknown. The evidence points to a very long time. Stone harpoon tips recovered from harvested bowheads make it evident that the whales live well over 100 years, and NOAA Fisheries says newer techniques for estimating age suggest they may live to be over 200 years old. Bowheads are built for the Arctic. They live almost exclusively in Arctic and subarctic waters with seasonal sea ice. Their blubber layer is 17 to 19 inches thick, thicker than that of any other whale. The bow-shaped skull can be over 16.5 feet long, about a third of the body length, and it is strong enough to break through sea ice 8 inches thick.",Animal,animal,https://factfusionai.com/fact/bowhead-whales-may-live-for-more-than-200-years/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/bowhead-whale,A,85,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
69,69,"A Narwhal's Tusk Is Actually a Tooth","Is a narwhal tusk a tooth?","The tusk of a male narwhal is a tooth that grows out through the front of the jaw; it can reach 9.8 feet long.","It is a tooth. NOAA Fisheries says a male narwhal's left upper tooth grows forward through the jaw into a spiraled tusk up to 9.8 feet long.","The narwhal's tusk looks like a horn, which is why the animal is so often compared to a unicorn. It is a tooth. NOAA Fisheries explains that narwhals have two teeth in the upper jaw. In females these teeth usually remain embedded in the jawbone. When a male reaches two or three years of age, the left tooth normally grows forward, out through the front of the jaw. The tusk spirals to the left, may grow up to 9.8 feet long and can weigh over 20 pounds. There are exceptions. Females with a tusk, and males with no tusk or with two, have occasionally been documented. NOAA Fisheries says the tusk mainly serves as a sign of status among males, and it may also be used as a sensory tool.",Animal,animal,https://factfusionai.com/fact/a-narwhals-tusk-is-actually-a-tooth/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/narwhal,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
70,70,"Gray Whales Migrate About 10,000 Miles Every Year","How far do gray whales migrate each year?","Gray whales make one of the longest annual migrations of any mammal, traveling about 10,000 miles round-trip.","About 10,000 miles round-trip. NOAA Fisheries calls it one of the longest annual migrations of any mammal, and some gray whales travel upwards of 14,000 miles.","Every year gray whales swim the length of a continent and back. NOAA Fisheries states that gray whales make one of the longest annual migrations of any mammal, traveling about 10,000 miles round-trip and in some cases upwards of 14,000 miles. The eastern North Pacific whales move between two very different places. They spend the summer feeding in the Arctic, mostly in the northern Bering and Chukchi seas. In the fall they head south along the coast of North America to spend the winter in the lagoons and bays of Baja California, Mexico, where calves are born. The route follows the coast, and shore-based observers have counted the whales migrating south along the central California coast in most years since 1967.",Animal,animal,https://factfusionai.com/fact/gray-whales-migrate-about-10000-miles-every-year/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/gray-whale,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
71,71,"The Fin Whale Is the Second-Largest Whale on Earth","What is the second largest whale?","The fin whale is the second-largest whale species on Earth, second only to the blue whale.","The fin whale. NOAA Fisheries says it is the second-largest whale species on Earth, second only to the blue whale.","The blue whale gets the attention, but the runner-up is impressive in its own right. NOAA Fisheries states that the fin whale is the second-largest whale species on Earth, second only to the blue whale, and that it is found throughout the world's oceans. Even a newborn is large. Calves are about 18 feet long at birth and weigh 4,000 to 6,000 pounds. Adults have appetites to match, and a fin whale eats up to 2 tons of food daily. NOAA Fisheries describes them as fast swimmers, which is one reason whalers did not target them at first. They are long-lived, with a maximum lifespan of about 90 years. One odd detail is the coloring of the head, which is dark on the left side of the lower jaw and white on the right.",Animal,animal,https://factfusionai.com/fact/the-fin-whale-is-the-second-largest-whale-on-earth/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/fin-whale,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
72,72,"The Green Turtle Is Named for Its Fat, Not Its Shell","Why is the green sea turtle called green?","The green turtle is named for the color of its fat, not its shell.","Its fat. NOAA Fisheries says the name ""green turtle"" comes from the color of the animal's fat, not its shell.","A green turtle's shell is not what earned it the name. NOAA Fisheries states that the name comes from the color of the animal's fat, not its shell. The green color was originally attributed to the turtle's diet, although NOAA Fisheries notes that other sea turtles have greenish fat as well. The diet is unusual in itself. Green turtles are unique among sea turtles in that they are primarily herbivores, eating mostly seagrasses and algae. The species holds a size record too, as the largest hard-shelled sea turtle. Green turtles are found throughout the world. According to NOAA Fisheries, they nest in over 80 countries and live in the coastal areas of more than 140 countries, and their lifespan is estimated to be 70 years or more.",Animal,animal,https://factfusionai.com/fact/the-green-turtle-is-named-for-its-fat-not-its-shell/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/green-turtle,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
73,73,"The Bison Is the Largest Land Mammal in North America","What is the largest land mammal in North America?","Bison are the largest land-dwelling mammals in North America; a male can weigh up to 2,000 pounds and still run 35 miles per hour.","The bison. The National Park Service says bison are the largest land-dwelling mammal in North America. Males weigh up to 2,000 pounds.","North America's biggest land animal is the bison. The U.S. National Park Service states that bison are the largest land-dwelling mammal in North America. A male, or bull, weighs up to 2,000 pounds, and a female, or cow, weighs up to 1,000 pounds. Size does not make them slow. According to the Park Service, bison are agile, are strong swimmers and can run 35 miles per hour. They can jump over objects about 5 feet high. Yellowstone has a special place in their story. It is the only place in the lower 48 states to have had a continuously free-ranging bison population since prehistoric times. It was a close call. By 1902, poachers had reduced Yellowstone's herd to about two dozen animals. The 2025 population estimate was nearly 5,300.",Animal,animal,https://factfusionai.com/fact/the-bison-is-the-largest-land-mammal-in-north-america/,"U.S. National Park Service",https://www.nps.gov/yell/learn/nature/bison.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
74,74,"Pronghorn Can Sprint at 45 to 50 Miles per Hour","How fast can a pronghorn run?","Pronghorn can run sprints at 45 to 50 miles per hour, an adaptation to outrun a cheetah that is now extinct.","45 to 50 miles per hour. The National Park Service says pronghorn evolved that speed to outrun a cheetah that is now extinct.","The pronghorn is faster than anything that hunts it today. The U.S. National Park Service says pronghorn can run sustained sprints of 45 to 50 miles per hour, and describes that speed as an adaptation to outrun an extinct cheetah. The predator is gone, but the speed remains. Together with keen vision, the Park Service notes, it makes adult pronghorn difficult prey for any natural predator. Pronghorn are a North American original. They are the surviving member of a group of animals that evolved in North America during the past 20 million years. Their horns are unusual as well. Pronghorn have true horns, but the sheaths are shed and grown again every year. Before European American settlement of the West, the pronghorn population was estimated at 35 million.",Animal,animal,https://factfusionai.com/fact/pronghorn-can-sprint-at-45-to-50-miles-per-hour/,"U.S. National Park Service",https://www.nps.gov/yell/learn/nature/pronghorn.htm,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
75,75,"The Giant Manta Ray Has a Wingspan of Up to 26 Feet","How big is a giant manta ray?","The giant manta ray is the world's largest ray, with a wingspan of up to 26 feet.","Up to 26 feet. NOAA Fisheries says the giant manta ray is the world's largest ray.","The giant manta ray earns its name. NOAA Fisheries states that it is the world's largest ray, with a wingspan of up to 26 feet. For all that size it eats very small things. Giant manta rays are filter feeders and eat large quantities of zooplankton. NOAA Fisheries describes them as slow-growing, migratory animals whose visits to coastlines and island groups seem to follow the movement of zooplankton, among other things. Their populations are small, highly fragmented and sparsely distributed across the world. Reproduction is slow, too. Manta rays typically give birth to only one pup every two to three years, among the lowest rates of all the cartilaginous fish in their group. In 2018, NOAA Fisheries listed the giant manta ray as threatened under the Endangered Species Act.",Animal,animal,https://factfusionai.com/fact/the-giant-manta-ray-has-a-wingspan-of-up-to-26-feet/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/giant-manta-ray,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
76,76,"Elephant Seals Spend About Nine Months a Year at Sea","How long do elephant seals spend at sea?","Northern elephant seals spend about nine months of the year in the ocean, most of that time underwater.","About nine months. NOAA Fisheries says northern elephant seals spend most of that time underwater, diving 1,000 to 2,500 feet for 20 to 30 minutes at a time.","People usually see elephant seals lying on beaches, but that is the smaller part of their lives. NOAA Fisheries states that northern elephant seals spend about 9 months of the year in the ocean. Most of that time is spent underwater. The seals dive to depths of about 1,000 to 2,500 feet for 20 to 30 minutes at a stretch, with only short breaks at the surface. They are big animals. NOAA Fisheries calls the northern elephant seal the largest of the true seals in the Northern Hemisphere. Fully grown males can reach lengths of over 13 feet and weigh nearly 4,400 pounds. The name comes from the males. At about 7 years old they develop a large inflatable nose, or proboscis, that overhangs the lower lip by about 8 inches.",Animal,animal,https://factfusionai.com/fact/elephant-seals-spend-about-nine-months-a-year-at-sea/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/northern-elephant-seal,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
77,77,"Some Humpback Whales Migrate 5,000 Miles","How far do humpback whales migrate?","Some humpback whale populations swim 5,000 miles between tropical breeding grounds and colder feeding grounds.","5,000 miles. NOAA Fisheries says some humpback populations swim that far between tropical breeding grounds and colder, more productive feeding grounds.","Humpback whales are among the great travelers of the animal world. NOAA Fisheries states that they have one of the longest migrations of any mammal on the planet, and that some populations swim 5,000 miles from tropical breeding grounds to colder, more productive feeding grounds. They can be quick about it. In the North Pacific, some humpbacks migrate from Alaska to Hawaii, and NOAA Fisheries says they can complete the 3,000 mile trip in as few as 28 days. At the feeding grounds, some groups hunt together using what is called bubble net feeding, in which curtains of air bubbles are used to condense prey before the whales lunge upward through the net. The name humpback comes from the distinctive hump on the whale's back.",Animal,animal,https://factfusionai.com/fact/some-humpback-whales-migrate-5000-miles/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/humpback-whale,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
78,78,"The Great Wall of China Is Not Visible From the Moon","Can you see the Great Wall of China from the Moon?","The Great Wall of China is not visible from the Moon, and it is difficult or impossible to see from Earth orbit without high-powered lenses.","No. NASA says the wall is not visible from the Moon, and is difficult or impossible to see from Earth orbit without high-powered lenses.","It is one of the most repeated claims about any structure on Earth: that the Great Wall of China can be seen from the Moon. NASA says it cannot. In the caption to a photograph of the wall taken from the International Space Station by Expedition 10 Commander Leroy Chiao, NASA states that, despite myths to the contrary, the wall isn't visible from the Moon. The caption goes further. Even from Earth orbit, where the space station flies and where this picture was taken, NASA says the wall is difficult or impossible to see without the high-powered lenses used for that photo. In other words, the photograph itself depended on camera equipment, not on the eye alone. The same image shows part of Inner Mongolia.",History,history,https://factfusionai.com/fact/the-great-wall-of-china-is-not-visible-from-the-moon/,NASA,https://www.nasa.gov/image-article/great-wall/,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
79,79,"The Declaration of Independence Was Not Signed on July 4","When was the Declaration of Independence signed?","The engrossed Declaration of Independence was signed on August 2, 1776, not on July 4.","August 2, 1776. The National Archives calls the idea that all the delegates signed on July 4 one of the most widely held misconceptions about the Declaration.","July 4, 1776, is the date the Declaration of Independence was approved, not the date it was signed. The U.S. National Archives, which holds the document, calls the belief that it was signed on July 4 by all the delegates in attendance one of the most widely held misconceptions about the Declaration. The paper trail is clear. On July 19, Congress ordered that the Declaration be fairly engrossed on parchment and signed by every member. Engrossing means preparing an official document in a large, clear hand. On August 2, the journal of the Continental Congress records that the engrossed declaration was signed. John Hancock, the President of the Congress, signed first. Eventually 56 delegates signed, although not all were present on August 2, and a few who had voted for adoption never signed at all.",History,history,https://factfusionai.com/fact/the-declaration-of-independence-was-not-signed-on-july-4/,"U.S. National Archives",https://www.archives.gov/founding-docs/declaration-history,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
80,80,"The Emancipation Proclamation Did Not End Slavery Nationwide","Did the Emancipation Proclamation free all slaves?","The Emancipation Proclamation of January 1, 1863, did not end slavery in the United States; it applied only to states that had seceded.","No. The National Archives says it applied only to states that had seceded, leaving slavery untouched in the loyal border states.","President Abraham Lincoln issued the Emancipation Proclamation on January 1, 1863. It declared that all persons held as slaves within the rebellious states are, and henceforward shall be, free. The U.S. National Archives, which holds the original, points out that despite this expansive wording the proclamation was limited in many ways. It applied only to states that had seceded from the United States, leaving slavery untouched in the loyal border states. Most important, the freedom it promised depended upon Union military victory. In the Archives' words, the proclamation did not end slavery in the nation. It did change the war. After January 1, 1863, every advance of federal troops expanded the domain of freedom, and by the end of the war almost 200,000 black soldiers and sailors had fought for the Union.",History,history,https://factfusionai.com/fact/the-emancipation-proclamation-did-not-end-slavery-nationwide/,"U.S. National Archives",https://www.archives.gov/exhibits/featured-documents/emancipation-proclamation,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
81,81,"The Only Surviving Viking Helmet Has No Horns","Did Vikings wear horned helmets?","Only one helmet from the Viking Age has been preserved, and it does not have horns.","It has none. The National Museum of Denmark says there is only one preserved helmet from the Viking Age, found at Gjermundbu in Norway, and it does not have horns.","The popular image of the Vikings is one of fearsome warriors wearing horned helmets. The National Museum of Denmark says the evidence does not support it. There is only one preserved helmet from the Viking Age, and it does not have horns. It was found in a warrior's burial at Gjermundbu, north of Oslo in Norway, together with the only complete suit of chain mail from the period. The museum gives practical reasons to doubt the horns as well. In a battle situation, horns on a helmet would get in the way, and they would have caused problems on board the warships, where space was already at a premium. In addition, the museum notes, none of the contemporary sources mention Vikings wearing horned headgear. It is even possible that relatively few Vikings wore helmets at all.",History,history,https://factfusionai.com/fact/the-only-surviving-viking-helmet-has-no-horns/,"National Museum of Denmark",https://en.natmus.dk/historical-knowledge/denmark/prehistoric-period-until-1050-ad/the-viking-age/weapons/helmets/,B,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
82,82,"The Liberty Bell's Famous Crack Is Actually a Repair","Is the Liberty Bell's crack a repair?","The wide ""crack"" in the Liberty Bell is a repair made in 1846, when metal workers widened a thin crack to stop it from spreading.","It is the repair. The National Park Service says metal workers widened a thin crack in 1846 to stop it spreading, and that wide gap is what visitors see.","The most famous crack in America is not quite what it seems. According to the U.S. National Park Service, no one recorded when or why the Liberty Bell first cracked. The most likely explanation is that a narrow split developed in the early 1840s after nearly 90 years of hard use. In 1846 the city decided to repair the bell before the holiday for George Washington's birthday. Metal workers widened the thin crack to prevent it spreading farther and to restore the bell's tone, using a technique called stop drilling. In the Park Service's words, the wide crack in the Liberty Bell is actually the repair job, and over 40 drill bit marks can still be seen in it. A second crack then appeared, and that one silenced the bell forever.",History,history,https://factfusionai.com/fact/the-liberty-bells-famous-crack-is-actually-a-repair/,"U.S. National Park Service",https://www.nps.gov/inde/learn/historyculture/stories-libertybell.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
83,83,"The Pony Express Lasted Only 18 Months","How long did the Pony Express last?","The Pony Express was in operation for only 18 months, between April 1860 and October 1861.","Only 18 months. The National Park Service says the Pony Express operated between April 1860 and October 1861.","Few things are more closely tied to the Old West than the Pony Express, yet it barely lasted a year and a half. The U.S. National Park Service states that it was in operation for only 18 months, between April 1860 and October 1861. While it ran, it was fast. Between St. Joseph, Missouri, and Sacramento, California, the riders covered more than 1,800 miles in 10 days, and could deliver a letter faster than ever before. Its replacement was already on the way. About ten weeks after the Pony Express began operations, Congress authorized a bill to subsidize the building of a transcontinental telegraph line. On October 26, 1861, San Francisco was in direct contact with New York City, the same month the Pony Express ended.",History,history,https://factfusionai.com/fact/the-pony-express-lasted-only-18-months/,"U.S. National Park Service",https://www.nps.gov/poex/learn/historyculture/index.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
84,84,"Paul Revere Was Captured Before He Reached Concord","Did Paul Revere make it to Concord?","On his midnight ride, Paul Revere was intercepted by a British patrol after leaving Lexington and never reached Concord.","No. The Paul Revere House says a British patrol intercepted him on the road to Concord. He was questioned, released without his horse, and walked back to Lexington.","Paul Revere's ride is remembered as a dash that ended in triumph. The account given by the Paul Revere House, the museum in his former home, is less tidy. Revere was sent to Lexington, Massachusetts, with the news that British soldiers were about to march into the countryside. He reached Lexington, where his warning is given as ""The regulars are coming out!"" He and William Dawes then decided to continue on to Concord, joined by Samuel Prescott. A short time later, a British patrol intercepted all three men. Prescott and Dawes escaped. Revere was held for some time, questioned and let go, but his horse was confiscated to replace the tired mount of a British sergeant. Left alone on the road, Revere returned to Lexington on foot, in time to witness part of the battle on Lexington Green.",History,history,https://factfusionai.com/fact/paul-revere-was-captured-before-he-reached-concord/,"Paul Revere House",https://www.paulreverehouse.org/the-real-story/,B,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
85,85,"Magellan Named the Pacific Ocean for Its Calm Water","Who named the Pacific Ocean?","Ferdinand Magellan named the Pacific Ocean after entering it in November 1520, because of the calmness of the water at the time.","Ferdinand Magellan, in 1520. NOAA says he called it pacific, meaning peaceful, because the water was calm when his fleet entered it.","The largest ocean on Earth got its name from one good day of weather. NOAA's National Ocean Service tells the story. In 1519 the Portuguese navigator Ferdinand Magellan, in the employ of Spain, began a journey across the Atlantic to seek a western route to the Spice Islands by way of South America. After braving perilous seas and navigating through what are now known as the Straits of Magellan, his small fleet entered an unfamiliar ocean in November 1520. He called this body of water pacific, because of the calmness of the water at the time. Pacific means peaceful. The explorers were in for a surprise. NOAA notes that they thought the Spice Islands were close at hand, when in fact they had ventured into the largest ocean on Earth.",History,history,https://factfusionai.com/fact/magellan-named-the-pacific-ocean-for-its-calm-water/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/pacific.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
86,86,"Earth's Tilt, Not Its Distance From the Sun, Causes Seasons","What causes the seasons on Earth?","Earth's tilted axis causes the seasons; in the Northern Hemisphere it is winter when Earth is closest to the Sun.","The tilt of Earth's axis. NASA says the Northern Hemisphere has winter when Earth is closest to the Sun and summer when it is farthest away.","Many people believe that Earth is closer to the Sun in the summer and that this is why it is hotter. NASA says that is not the reason. Earth's tilted axis causes the seasons. Earth's axis is an imaginary pole running through the center of the planet, and it does not stand up straight. It leans over a bit. When the North Pole tilts toward the Sun, it is summer in the Northern Hemisphere. When the South Pole tilts toward the Sun, it is winter in the Northern Hemisphere. Distance does change during the year, but NASA points out that it works against the popular idea: in the Northern Hemisphere, we have winter when Earth is closest to the Sun and summer when it is farthest away. The change in distance does not make much difference to our weather.",Science,science,https://factfusionai.com/fact/earths-tilt-not-its-distance-from-the-sun-causes-seasons/,NASA,https://spaceplace.nasa.gov/seasons/en/,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
87,87,"Every Snowflake Has Six Sides","How many sides does a snowflake have?","Snowflakes are six-sided: although their arms can branch in many ways, the six-sided shape is always maintained.","Six. NOAA says water molecules arrange themselves to form a six-sided snowflake, and that the six-sided shape is always maintained.","Snowflakes come in endless patterns, but they share one rule. NOAA explains that a snowflake begins as an ice crystal. As it falls, water vapor freezes onto that first crystal, building new crystals that become the six arms of the snowflake. The symmetry comes from inside. The crystals reflect the internal order of the water molecules, which arrange themselves in predetermined spaces to form a six-sided snowflake. Temperature, and to a lesser extent humidity, decides the basic shape. If conditions change as the flake falls, the arms may branch off in new directions, but NOAA states that the six-sided shape is always maintained. Because each arm experiences the same conditions, the arms look identical. Individual flakes take different paths through the sky, so they all tend to look unique.",Science,science,https://factfusionai.com/fact/every-snowflake-has-six-sides/,"National Oceanic and Atmospheric Administration",https://www.noaa.gov/stories/how-do-snowflakes-form-science-behind-snow,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
88,88,"About 90 Percent of People Struck by Lightning Survive","Do most people survive a lightning strike?","Only about 10 percent of people who are struck by lightning are killed.","About 90 percent. The U.S. National Weather Service says only about 10 percent of people struck by lightning are killed, though survivors are left with various degrees of disability.","Being struck by lightning sounds like certain death. The U.S. National Weather Service says it usually is not. Only about 10 percent of people who are struck by lightning are killed. That is no reason to take it lightly, because the same sentence continues that the other 90 percent are left with various degrees of disability. A strike can cause cardiac arrest, the heart stopping, at the time of the injury. The Weather Service also gives the scale of the danger in the United States. Over the 30 years from 1989 to 2018, the country averaged 43 reported lightning fatalities per year. In the last 10 years of that period, from 2009 to 2018, the average was lower, at 27 lightning fatalities a year.",Science,science,https://factfusionai.com/fact/about-90-percent-of-people-struck-by-lightning-survive/,"U.S. National Weather Service",https://www.weather.gov/safety/lightning-odds,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
89,89,"Your Kidneys Filter About 150 Quarts of Blood a Day","How much blood do your kidneys filter a day?","In a single day, healthy kidneys filter about 150 quarts of blood, roughly half a cup every minute.","About 150 quarts a day. The U.S. National Institutes of Health says healthy kidneys filter about a half cup of blood every minute.","Each kidney is only about the size of a fist, but the pair never stop working. The National Institute of Diabetes and Digestive and Kidney Diseases, part of the U.S. National Institutes of Health, states that healthy kidneys filter about a half cup of blood every minute, removing wastes and extra water to make urine. Over a single day that adds up to about 150 quarts of blood. Very little of it leaves the body. Most of the water and other substances that are filtered are returned to the blood, and only 1 to 2 quarts become urine. The work is done by tiny units. Each kidney is made up of about a million filtering units called nephrons, and each nephron has a filter, called the glomerulus, and a tubule.","Human Body",human-body,https://factfusionai.com/fact/your-kidneys-filter-about-150-quarts-of-blood-a-day/,"U.S. National Institutes of Health",https://www.niddk.nih.gov/health-information/kidney-disease/kidneys-how-they-work,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
90,90,"You Are Born With About 10,000 Taste Buds","How many taste buds do you have?","At birth, a person has about 10,000 taste buds, and may start to lose them after age 50.","About 10,000. The U.S. National Institutes of Health says you have about 10,000 taste buds at birth and may start to lose them after age 50.","Taste starts with taste cells, which are clustered within the taste buds of the tongue and the roof of the mouth, and along the lining of the throat. The National Institute on Deafness and Other Communication Disorders, part of the U.S. National Institutes of Health, states that at birth you have about 10,000 taste buds, but after age 50 you may start to lose them. Taste cells are unusual. Along with the sensory cells that help you smell, they are the only sensory cells in the human body that are regularly replaced throughout life. They respond to at least five basic taste qualities: sweet, sour, bitter, salty and umami, or savory. Taste alone is not flavor, though. The institute notes that most people who think they have a taste disorder actually have a problem with smell.","Human Body",human-body,https://factfusionai.com/fact/you-are-born-with-about-10000-taste-buds/,"U.S. National Institutes of Health",https://www.nidcd.nih.gov/health/taste-disorders,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
91,91,"The Human Body Has More Than 650 Muscles","How many muscles are in the human body?","There are more than 650 muscles in the human body, of three main types: skeletal, smooth and cardiac.","More than 650. The U.S. National Institutes of Health says they come in three main types: skeletal, smooth and cardiac.","Muscles do far more than lift heavy things. The National Institute of Arthritis and Musculoskeletal and Skin Diseases, part of the U.S. National Institutes of Health, states that there are more than 650 muscles in the human body and that muscles control all movement in the body. They also help you breathe, pump your blood and move food through your gut. There are three main types of muscle: skeletal, smooth and cardiac. Skeletal muscles help you move, sit up straight and keep your balance. They are sometimes called voluntary muscles because you can control them. Smooth muscles work without you having to think about them, which is why they are sometimes called involuntary muscles. They help you focus your eyes and move food through your body. Even when you sit perfectly still, muscles in your body are constantly working.","Human Body",human-body,https://factfusionai.com/fact/the-human-body-has-more-than-650-muscles/,"U.S. National Institutes of Health",https://www.niams.nih.gov/health-topics/educational-resources/health-lesson-learning-about-muscles,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
92,92,"Brazil Nuts Contain a Small Amount of Radium","Are Brazil nuts radioactive?","Brazil nuts contain a small amount of radium, a radioactive element taken up from the soil in which they are grown.","Yes. The U.S. Environmental Protection Agency says Brazil nuts contain a small amount of radium taken up from the soil, too little to pose a radiation risk.","Bananas are not the only food with a trace of natural radioactivity. The U.S. Environmental Protection Agency names bananas and Brazil nuts as the most well known examples of foods that contain it. Like bananas, Brazil nuts contain potassium, a small fraction of which is radioactive. Brazil nuts go one step further. According to the EPA, they also contain a small amount of radium that is taken up from the soil in which they are grown. This is how such elements usually get into food: the roots of plants take in radionuclides from the soil. None of this is a reason to change what you eat. The EPA states that because the amount of radiation is very small, these foods do not pose a radiation risk.",Food,food,https://factfusionai.com/fact/brazil-nuts-contain-a-small-amount-of-radium/,"U.S. Environmental Protection Agency",https://www.epa.gov/radtown/natural-radioactivity-food,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
93,93,"The U.S. Supreme Court Ruled That Tomatoes Are Vegetables","Is a tomato a fruit or a vegetable?","In Nix v. Hedden, the U.S. Supreme Court held that tomatoes are vegetables for the purposes of the tariff act of 1883, while accepting that botanically they are the fruit of a vine.","A vegetable, in U.S. tariff law. In Nix v. Hedden the Supreme Court accepted that tomatoes are botanically the fruit of a vine, but classed them as vegetables in the common language of the people.","The question of whether a tomato is a fruit or a vegetable once reached the U.S. Supreme Court. The case, Nix v. Hedden, was about money. Importers had paid a duty on tomatoes brought from the West Indies, charged under the tariff act of 1883 as vegetables, and argued the tomatoes should have come in free as fruit. In the Court's words, the single question was whether tomatoes, considered as provisions, are to be classed as vegetables or as fruit within the meaning of that act. The opinion grants the science: botanically speaking, tomatoes are the fruit of a vine, just as are cucumbers, squashes, beans and peas. But in the common language of the people, the Court said, all these are vegetables, usually served at dinner with the main part of the meal and not, like fruits generally, as dessert.",Food,food,https://factfusionai.com/fact/the-u-s-supreme-court-ruled-that-tomatoes-are-vegetables/,"U.S. Supreme Court, Nix v. Hedden",https://www.law.cornell.edu/supremecourt/text/149/304,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
94,94,"Bacteria in Food Can Double in Just 20 Minutes","How fast do bacteria grow in food?","Between 40 and 140 degrees Fahrenheit, bacteria in food grow most rapidly and can double in number in as little as 20 minutes.","In as little as 20 minutes. The U.S. Department of Agriculture says bacteria grow most rapidly between 40 and 140 degrees Fahrenheit, a range it calls the Danger Zone.","Food left out on the counter changes faster than it looks. The Food Safety and Inspection Service of the U.S. Department of Agriculture states that bacteria grow most rapidly in the range of temperatures between 40 and 140 degrees Fahrenheit, doubling in number in as little as 20 minutes. The agency calls this range the Danger Zone. The advice that follows from it is simple. Keep hot food hot, at or above 140 degrees Fahrenheit, and keep cold food cold, at or below 40 degrees. Leftovers need attention as well. According to the agency, they must be put in shallow containers for quick cooling and refrigerated at 40 degrees or below within two hours. The point of the shallow container is speed, so that the food passes through the Danger Zone quickly.",Food,food,https://factfusionai.com/fact/bacteria-in-food-can-double-in-just-20-minutes/,"U.S. Department of Agriculture",https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/danger-zone-40f-140f,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
95,95,"The Brain Keeps Maturing Until the Mid-to-Late 20s","At what age is the brain fully developed?","The human brain finishes developing and maturing in the mid-to-late 20s, and the prefrontal cortex is one of the last parts to mature.","The mid-to-late 20s. The U.S. National Institute of Mental Health says the prefrontal cortex, behind the forehead, is one of the last parts to mature.","A teenager can look fully grown long before the brain has finished its work. The U.S. National Institute of Mental Health states that the brain finishes developing and maturing in the mid-to-late 20s. The part of the brain behind the forehead, called the prefrontal cortex, is one of the last parts to mature. The institute connects this to behavior. Ongoing development of the prefrontal cortex, together with the emphasis teens place on relationships with their peers, might lead them to take more risks, because the social benefits outweigh the possible consequences of a decision. An unfinished brain is also a flexible one. The institute describes the teen brain as ready to learn and adapt, and says that challenging classes, exercise and creative activities like art or music can strengthen brain circuits and help the brain mature.",Psychology,psychology,https://factfusionai.com/fact/the-brain-keeps-maturing-until-the-mid-to-late-20s/,"U.S. National Institute of Mental Health",https://www.nimh.nih.gov/health/publications/the-teen-brain-7-things-to-know,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
96,96,"Teenagers' Sleep Hormone Runs on a Later Schedule","Why do teenagers stay up late?","In adolescence, levels of the sleep hormone melatonin stay high later at night and drop later in the morning than in children and adults.","Their melatonin runs late. The U.S. National Institute of Mental Health says teen melatonin levels stay high later at night and drop later in the morning.","Teenagers who stay up late and cannot get out of bed are not simply being difficult. The U.S. National Institute of Mental Health says research shows that the sleep hormone melatonin works differently in teens than in children and adults. In adolescence, melatonin levels stay high later at night and drop later in the morning. According to the institute, this may explain why teens may stay up late and struggle with waking up early. Note the word may: it is offered as a likely explanation, not a proven one. The consequences are real either way. The institute states that most teens do not get enough sleep, which makes it harder to pay attention, control impulses and do well at school. It adds that getting good sleep at night can help support mental health.",Psychology,psychology,https://factfusionai.com/fact/teenagers-sleep-hormone-runs-on-a-later-schedule/,"U.S. National Institute of Mental Health",https://www.nimh.nih.gov/health/publications/the-teen-brain-7-things-to-know,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
97,97,"Crater Lake Is the Deepest Lake in the United States","What is the deepest lake in the United States?","Crater Lake in Oregon is the deepest lake in the United States, at 1,943 feet (592 meters).","Crater Lake. The National Park Service says it is the deepest lake in the United States, at 1,943 feet (592 meters), and one of the ten deepest in the world.","The deepest lake in the United States sits inside a collapsed volcano. The U.S. National Park Service states that Crater Lake is the deepest lake in the United States and one of the top ten deepest in the world, with a depth of 1,943 feet, or 592 meters. The basin formed about 7,700 years ago, when a massive eruption caused the central portion of Mount Mazama to collapse inward. Before the collapse the mountain stood about 12,000 feet tall. Over several hundred years, rain and snow partially filled the caldera. According to the Park Service, evaporation and seepage keep the lake from filling beyond its present depth. The lake is widely known for its rich blue color and extreme clarity, and it holds about 4.9 trillion gallons of water.",Geography,geography,https://factfusionai.com/fact/crater-lake-is-the-deepest-lake-in-the-united-states/,"U.S. National Park Service",https://www.nps.gov/crla/learn/nature/crater-lake.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
98,98,"North America's Tallest Mountain Is 20,310 Feet High","How tall is the tallest mountain in North America?","North America's tallest mountain, Mount McKinley in Alaska's Denali National Park, is 20,310 feet tall.","20,310 feet. The National Park Service says Mount McKinley, in Denali National Park and Preserve, is North America's tallest mountain.","The roof of North America is in Alaska. The U.S. National Park Service states that the Alaska Range, a 600-mile long arc of mountains, features North America's tallest mountain, Mount McKinley, which towers over the landscape at 20,310 feet tall. The mountain stands inside Denali National Park and Preserve, and the Park Service page that gives these figures uses the name Mount McKinley for the peak. The setting is as dramatic as the height. According to the Park Service, Alaska is the most geologically active part of the country, and immense tectonic forces wrinkle and crumple the land to form the Alaska Range. Earthquakes are frequent in the area. Ice does the rest of the sculpting. Glaciers cover one million acres, or one-sixth of the park.",Geography,geography,https://factfusionai.com/fact/north-americas-tallest-mountain-is-20310-feet-high/,"U.S. National Park Service",https://www.nps.gov/dena/learn/nature/denali.htm,A,90,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
99,99,"Yellowstone Has More Than Half of the World's Geysers","How many of the world's geysers are in Yellowstone?","Yellowstone National Park has more than 500 active geysers, more than half of the world's geysers.","More than half. The National Park Service says Yellowstone has more than 500 active geysers, which is more than half the world's geysers.","Geysers are rare, and most of them are in one park. The U.S. National Park Service lists more than 500 active geysers in Yellowstone National Park, and notes that this is more than half the world's geysers. They are part of a larger picture. The park has more than 10,000 hydrothermal features in all. Yellowstone holds another distinction. The Park Service states that it is the world's first national park, established on March 1, 1872. It is big, too. The park covers 3,472 square miles, or 2,221,766 acres, which the Park Service points out is larger than Rhode Island and Delaware combined. Nearly all of it is in one state. About 96 percent of the park is in Wyoming, with 3 percent in Montana and 1 percent in Idaho.",Geography,geography,https://factfusionai.com/fact/yellowstone-has-more-than-half-of-the-worlds-geysers/,"U.S. National Park Service",https://www.nps.gov/yell/planyourvisit/parkfacts.htm,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
100,100,"Jellyfish Have No Brain, Blood or Heart","Do jellyfish have a brain or a heart?","Jellyfish have no brains, blood or hearts, and their bodies are about 95 percent water.","None of them. NOAA says jellyfish lack brains, blood and hearts, and that only about five percent of a jellyfish's body is solid matter.","A jellyfish gets by with remarkably little. NOAA's National Ocean Service describes jellyfish as pretty simple critters, lacking brains, blood, or even hearts. They are mostly water. Only about five percent of the body of a jellyfish is solid matter, and the rest, about 95 percent, is water, which is why a jellyfish out of the sea collapses into a blob. What they do have is an elementary nervous system, or nerve net, which allows them to smell, detect light and respond to other stimuli. Digestion is equally basic. A simple cavity acts as both stomach and intestine, with one opening serving as both the mouth and the anus. Jellyfish belong to the phylum Cnidaria, the same group as sea anemones and corals, and their body parts radiate from a central axis.",Weird,weird,https://factfusionai.com/fact/jellyfish-have-no-brain-blood-or-heart/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/jellyfish.html,A,95,2026-10-02,"Ali Ahmad Chaudhry",2026-10-02,2026-10-02,yes
101,101,"The Webb Telescope Orbits the Sun, Not the Earth","Does the Webb telescope orbit Earth?","The James Webb Space Telescope does not orbit the Earth: it orbits the Sun, 1.5 million kilometers (1 million miles) from Earth, at the second Lagrange point.","Around the Sun. NASA says Webb orbits the Sun 1.5 million kilometers (1 million miles) from Earth, at a place called the second Lagrange point, or L2.","The Hubble Space Telescope circles the Earth a few hundred miles up. Its successor went somewhere quite different. NASA states that the James Webb Space Telescope is not in orbit around the Earth. It orbits the Sun, 1.5 million kilometers, or 1 million miles, away from the Earth, at what is called the second Lagrange point, or L2. What is special about this orbit, NASA explains, is that it lets the telescope stay in line with the Earth as it moves around the Sun. That allows the large sunshield to protect the telescope from the light and heat of the Sun, the Earth and the Moon. It took roughly 30 days for Webb to reach the start of its orbit, although it needed only 3 days to get as far away as the Moon's orbit.",Technology,technology,https://factfusionai.com/fact/the-webb-telescope-orbits-the-sun-not-the-earth/,NASA,https://science.nasa.gov/mission/webb/orbit/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
102,102,"A Helicopter Made the First Powered Flight on Another Planet","What made the first powered flight on another planet?","On April 19, 2021, NASA's Ingenuity helicopter made the first powered, controlled flight on another planet, in the skies of Mars.","NASA's Ingenuity helicopter, on Mars, on April 19, 2021. It went on to complete 72 flights before its mission ended in January 2024.","The first aircraft to fly on another world was a small helicopter. NASA states that on April 19, 2021, its Ingenuity Mars Helicopter completed the first powered, controlled flight on another planet, a feat that has been called a Wright Brothers moment. Ingenuity rode to Mars strapped beneath the Perseverance rover. It was light, at about 4 pounds, or 1.8 kilograms. NASA designed it as a technology demonstration that would make no more than five test flights in 30 days. It did far more than that. The helicopter eventually completed 72 flights across nearly three years, soaring higher and faster than previously imagined. According to NASA, Ingenuity flew for the last time on January 18, 2024, and completed its mission on January 25, 2024.",Technology,technology,https://factfusionai.com/fact/a-helicopter-made-the-first-powered-flight-on-another-planet/,NASA,https://science.nasa.gov/mission/mars-2020-perseverance/ingenuity-mars-helicopter/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
103,103,"The Parker Solar Probe Travels at About 430,000 mph","How fast is the Parker Solar Probe?","At its closest approach to the Sun, NASA's Parker Solar Probe travels at approximately 430,000 miles per hour (700,000 kilometers per hour).","About 430,000 miles per hour. NASA gives that as the speed of the Parker Solar Probe at its closest approach to the Sun.","NASA built the Parker Solar Probe to go where no spacecraft had gone before. In the agency's words, it is on a mission to touch the Sun. In 2021 it became the first spacecraft to fly through the corona, the Sun's upper atmosphere, which NASA describes as the first time in history that a spacecraft had touched the Sun. Getting that close means going very fast. NASA states that at closest approach, the Parker Solar Probe hurtles around the Sun at approximately 430,000 miles per hour, or 700,000 kilometers per hour. At that point the spacecraft comes within about 3.9 million miles, or 6.2 million kilometers, of the Sun. NASA's page also describes the solar wind sent out by the Sun, which whips along at speeds exceeding one million miles per hour.",Technology,technology,https://factfusionai.com/fact/the-parker-solar-probe-travels-at-about-430000-mph/,NASA,https://science.nasa.gov/mission/parker-solar-probe/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
104,104,"The Space Station Is as Long as a Football Field","How big is the International Space Station?","The International Space Station is 356 feet (109 meters) end to end, one yard short of the full length of an American football field including the end zones.","356 feet, or 109 meters. NASA says that is one yard shy of the full length of an American football field including the end zones.","The International Space Station is the largest thing people have built in orbit, and NASA offers familiar comparisons for its size. The station is 356 feet, or 109 meters, end-to-end, which NASA says is one yard shy of the full length of an American football field including the end zones. Its mass is 925,335 pounds, or 419,725 kilograms. Inside, the living and working space is larger than a six-bedroom house, and it has six sleeping quarters, two bathrooms, a gym and a 360-degree view bay window. An acre of solar panels powers the station. NASA notes that those panels are the reason you can sometimes look up at dawn or dusk and see the station flying over your home, even if you live in a big city.",Technology,technology,https://factfusionai.com/fact/the-space-station-is-as-long-as-a-football-field/,NASA,https://www.nasa.gov/international-space-station/space-station-facts-and-figures/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
105,105,"People Have Lived in Space Without a Break Since 2000","How long have people lived on the space station?","The International Space Station has been continuously occupied since November 2000.","Since November 2000. NASA says the International Space Station has been continuously occupied since then.","For more than two decades there has always been someone living off the planet. NASA states that the International Space Station has been continuously occupied since November 2000. The station is a shared project. An international partnership of five space agencies from 15 countries operates it, and NASA describes an international crew of seven people who live and work on board while traveling at five miles per second. The crew does a great deal of science. According to NASA, through Expedition 60 the laboratory had hosted nearly 3,000 research investigations from researchers in more than 108 countries. The people on board have also taken more than 3.5 million photographs of Earth. One person stands out for time served: NASA says Peggy Whitson set the U.S. record of 665 days living and working in space on September 2, 2017.",Technology,technology,https://factfusionai.com/fact/people-have-lived-in-space-without-a-break-since-2000/,NASA,https://www.nasa.gov/international-space-station/space-station-facts-and-figures/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
106,106,"GPS Satellites Circle the Earth Twice a Day","How often do GPS satellites orbit Earth?","GPS satellites fly at an altitude of approximately 20,200 kilometers (12,550 miles), and each one circles the Earth twice a day.","Twice a day. GPS.gov says each GPS satellite circles the Earth twice a day at an altitude of about 20,200 kilometers (12,550 miles).","The satellites behind every map app are much farther away than the space station. GPS.gov, the U.S. government's official site for the system, states that GPS satellites fly in medium Earth orbit at an altitude of approximately 20,200 kilometers, or 12,550 miles, and that each satellite circles the Earth twice a day. They are arranged with care. The satellites sit in six equally spaced orbital planes surrounding the Earth, a layout that ensures users can view at least four satellites from virtually any point on the planet. The United States is committed to keeping at least 24 GPS satellites operational 95 percent of the time. In practice there are more. According to GPS.gov, as of July 3, 2023, there were 31 operational satellites in the constellation.",Technology,technology,https://factfusionai.com/fact/gps-satellites-circle-the-earth-twice-a-day/,GPS.gov,https://www.gps.gov/space-segment,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
107,107,"The Voyager Golden Record Carries Greetings in 55 Languages","How many languages are on the Voyager Golden Record?","Both Voyager spacecraft carry a 12-inch gold-plated copper phonograph record with sounds, images, music and spoken greetings in 55 languages.","In 55 languages. NASA says each Voyager carries a 12-inch gold-plated copper record with sounds, images, music and spoken greetings from Earth.","The two Voyager spacecraft carry a message in case anyone ever finds them. NASA describes it as a unique time capsule. Launched in 1977, both spacecraft carry it with them into interstellar space. The message is on a phonograph record, a 12-inch gold-plated copper disk containing sounds and images selected to portray the diversity of life and culture on Earth. According to NASA, the record features images and a variety of natural sounds, such as thunder and birds, along with musical selections from different cultures and eras, and spoken greetings in 55 languages. It comes with a manual of sorts. The record's protective cover includes instructions for playing its contents, for finding Earth in the cosmos, and for dating how long the record has been in space.",Technology,technology,https://factfusionai.com/fact/the-voyager-golden-record-carries-greetings-in-55-languages/,NASA,https://science.nasa.gov/mission/voyager/voyager-golden-record-overview/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
108,108,"The Curiosity Mars Rover Is the Size of a Small SUV","How big is the Curiosity rover?","NASA's Curiosity rover on Mars is about the size of a small SUV: 10 feet long, 9 feet wide and 7 feet tall, not including its arm.","About the size of a small SUV. NASA gives Curiosity's size as 10 feet long, 9 feet wide and 7 feet tall, not including the arm.","Pictures from Mars give little sense of scale, so it is easy to imagine the rovers as small machines. Curiosity is not. NASA describes it as about the size of a small SUV: 10 feet long, 9 feet wide and 7 feet tall, not including the arm. The car-size rover is about as tall as a basketball player, and it uses a 7 foot-long arm to place tools close to rocks selected for study. The size has a purpose. According to NASA, Curiosity's large size allows it to carry an advanced kit of 10 science instruments. Its tools include 17 cameras, a laser to vaporize and study small pinpoint spots of rock at a distance, and a drill to collect powdered rock samples. Curiosity has been exploring Gale Crater on Mars since 2012.",Technology,technology,https://factfusionai.com/fact/the-curiosity-mars-rover-is-the-size-of-a-small-suv/,NASA,https://science.nasa.gov/mission/msl-curiosity/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
109,109,"A Second Is Defined by 9,192,631,770 Ticks of a Cesium Atom","How is a second defined?","The second is defined using cesium atoms: an atomic clock counts 9,192,631,770 microwave oscillations, and that interval is one second.","9,192,631,770 oscillations. NIST says atomic clocks count that many microwave oscillations of cesium atoms and call the elapsed time a second.","The second is the international unit of time, and today it is defined by atoms. The U.S. National Institute of Standards and Technology explains that the second is currently defined using cesium atoms, which absorb and emit microwave radiation with a specific frequency. Atomic clocks count 9,192,631,770 of those microwave oscillations, and the elapsed time interval is called a second. The advantage, according to NIST, is that atomic clocks let us define the second, the international unit of time, in a precise and measurable way that does not change over time. The results are remarkable. NIST says commercially available cesium clocks keep time to within 1/3,000,000 of a second per year. The ideas of the minute and the second themselves are ancient, and NIST notes they began in astronomy, not timekeeping.",Science,science,https://factfusionai.com/fact/a-second-is-defined-by-9192631770-ticks-of-a-cesium-atom/,"U.S. National Institute of Standards and Technology",https://www.nist.gov/si-redefinition/second-introduction,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
110,110,"The Sky Is Blue Because Blue Light Scatters the Most","Why is the sky blue?","The sky is blue because blue light is scattered more than other colors by the gases in the air, since it travels as shorter, smaller waves.","Because blue light is scattered the most. NASA says it travels as shorter, smaller waves and is scattered in all directions by the molecules of air.","Sunlight looks white, yet the sky looks blue. NASA explains the difference. Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Light energy travels in waves, and not all colors travel the same way. Some light travels in short, choppy waves, and other light travels in long, lazy waves. Blue light waves are shorter than red light waves. According to NASA, blue light is scattered more than the other colors because it travels as shorter, smaller waves, and it is scattered in all directions by the tiny molecules of air in Earth's atmosphere. With blue light coming at us from every part of the sky, that is the color we see. In NASA's words, this is why we see a blue sky most of the time.",Science,science,https://factfusionai.com/fact/the-sky-is-blue-because-blue-light-scatters-the-most/,NASA,https://spaceplace.nasa.gov/blue-sky/en/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
111,111,"A Light-Year Is About 6 Trillion Miles","How far is a light-year?","A light-year is the distance light travels in one Earth year, about 6 trillion miles (9 trillion kilometers).","About 6 trillion miles, or 9 trillion kilometers. NASA says a light-year is the distance light travels in one Earth year.","Despite the name, a light-year measures distance, not time. NASA defines it as the distance light travels in one Earth year, and puts the figure at about 6 trillion miles, or 9 trillion kilometers. Light can cover that much ground because it is so fast. It travels at a speed of 186,000 miles, or 300,000 kilometers, per second. Astronomers use light-years because the distances in space are too large for ordinary units. NASA gives some examples. The next closest star to us after the Sun is about 4.3 light-years away. The nearest large galaxy, Andromeda, is 2.5 million light-years away. Looking that far means looking back in time. NASA notes that an object 13.4 billion light-years away is seen today as it was 13.4 billion years ago.",Science,science,https://factfusionai.com/fact/a-light-year-is-about-6-trillion-miles/,NASA,https://spaceplace.nasa.gov/light-year/en/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
112,112,"Lightning Flashes About 25 Million Times a Year in the U.S.","How often does lightning strike in the U.S.?","In the United States, there are about 25 million lightning flashes every year.","About 25 million. The U.S. National Weather Service says there are about 25 million lightning flashes in the United States every year.","Lightning is far more common than most people would guess. The U.S. National Weather Service states that in the United States there are about 25 million lightning flashes every year, and adds that each of those 25 million flashes is a potential killer. The Weather Service calls lightning fascinating to watch but also extremely dangerous. Lightning fatalities have decreased over the past 30 years, yet lightning continues to be one of the top weather killers in the United States, and it injures many more people than it kills. The practical advice is blunt. If you hear thunder, even a distant rumble, you are already in danger of becoming a lightning victim. The same page gives a way to judge distance: count the seconds between the flash and the thunder, and divide by 5 to get the number of miles.",Science,science,https://factfusionai.com/fact/lightning-flashes-about-25-million-times-a-year-in-the-u-s/,"U.S. National Weather Service",https://www.weather.gov/safety/lightning-science-overview,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
113,113,"The Sun Always Lights Up Half of the Moon","How much of the Moon does the Sun light up?","The Sun always illuminates one half of the Moon; the Moon's phases are caused by how much of that lit half we can see from Earth.","Half, always. NASA says the Sun always lights the side of the Moon facing it. The phases come from how much of that lit half we see from Earth.","The Moon seems to grow and shrink over a month, but nothing about the Moon itself is changing. NASA puts it plainly: the shape of the Moon isn't changing throughout the month. The Sun's light comes from one direction, and it always illuminates one half of the Moon, the side that is facing the Sun. What changes is our view. According to NASA, our view of the illuminated part of the Moon changes each night, depending on where the Moon is in its orbit around Earth. When we have a full view of the lit side, that is a full moon. When the side facing Earth is dark, that is a new moon. NASA adds one more correction to everyday language. What is called moonlight is actually just sunlight reflecting off the Moon's surface.",Science,science,https://factfusionai.com/fact/the-sun-always-lights-up-half-of-the-moon/,NASA,https://spaceplace.nasa.gov/moon-phases/en/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
114,114,"The Air You Breathe Is 78 Percent Nitrogen","What is air mostly made of?","Near the surface, Earth's atmosphere consists of 78 percent nitrogen, 21 percent oxygen and 1 percent other gases.","Nitrogen, at 78 percent. NASA says the atmosphere near the surface is 78% nitrogen, 21% oxygen and 1% other gases such as argon, carbon dioxide and neon.","We think of air as oxygen, because oxygen is the part we need. Most of it is something else. NASA states that near the surface, Earth has an atmosphere that consists of 78 percent nitrogen, 21 percent oxygen and 1 percent other gases, such as argon, carbon dioxide and neon. That thin layer does a lot of work. According to NASA, the atmosphere affects Earth's long-term climate and short-term local weather, and it shields us from much of the harmful radiation coming from the Sun. It is also a shield against rocks from space. NASA says the atmosphere protects us from meteoroids, most of which burn up in the atmosphere before they can strike the surface. We see them in the night sky as meteors. The ones that reach the ground are called meteorites.",Science,science,https://factfusionai.com/fact/the-air-you-breathe-is-78-percent-nitrogen/,NASA,https://science.nasa.gov/earth/facts/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
115,115,"The Largest U.S. Hailstone Was 8 Inches Across","What is the largest hailstone in the U.S.?","The largest hailstone on record in the United States fell at Vivian, South Dakota, on July 23, 2010: it measured 8.0 inches in diameter and weighed 1.9375 pounds.","8 inches across and nearly 2 pounds. The National Weather Service recorded it at Vivian, South Dakota, on July 23, 2010.","On July 23, 2010, thunderstorms developed over central South Dakota, and the community of Vivian was one of the hardest hit. The U.S. National Weather Service reports that a record setting hailstone was discovered there, measuring 8.0 inches in diameter and 18.625 inches in circumference, and weighing 1.9375 pounds. It broke the previous United States records for diameter, which was 7.0 inches, set in Aurora, Nebraska, in 2003, and for weight, which was 1.67 pounds, set in Coffeyville, Kansas, in 1970. The Aurora stone keeps the record for circumference. The measurements may understate the stone. The Weather Service notes that the official dimensions are those taken when its staff first observed and measured it. It was not alone, either. Many other stones with diameters exceeding 6 inches were noted during the storm survey.",Science,science,https://factfusionai.com/fact/the-largest-u-s-hailstone-was-8-inches-across/,"U.S. National Weather Service",https://www.weather.gov/abr/vivianhailstone,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
116,116,"Bristlecone Pines Are the Oldest Non-Clonal Species on Earth","What is the oldest non-clonal tree species?","Great Basin bristlecone pines are the oldest non-clonal species on the planet, surviving for thousands of years.","The Great Basin bristlecone pine. The National Park Service calls it the oldest non-clonal species on the planet, with trees that survive thousands of years.","Some trees alive today were already old when ancient empires rose. The U.S. National Park Service describes Great Basin bristlecone pines as remarkable for being the oldest non-clonal species on the planet. These trees, shaped by wind, snow and rain, survive thousands of years. Hard conditions are part of the secret. Bristlecones live at high elevations where little else grows. They grow very slowly there, and in some years do not even add a ring of growth. The same trees at lower elevations grow faster but do not reach such ages. The word non-clonal matters. The Park Service notes that clonal organisms, groups of genetically identical plants that clone themselves non-sexually, are considered to be much older. It gives the example of a quaking aspen grove in Utah known as Pando, estimated to be around 16,000 years old.",Nature,nature,https://factfusionai.com/fact/bristlecone-pines-are-the-oldest-non-clonal-species-on-earth/,"U.S. National Park Service",https://www.nps.gov/grba/planyourvisit/identifying-bristlecone-pines.htm,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
117,117,"A Saguaro Cactus Waits Decades Before Growing Its First Arm","How old is a saguaro when it grows arms?","At Saguaro National Park, a saguaro cactus normally begins to grow branches, or arms, only when it reaches 60 to 75 years of age.","About 60 to 75 years. The National Park Service says that is when branches normally begin to appear on a saguaro at Saguaro National Park.","The saguaro, with its raised arms, is the cactus of every desert cartoon. Those arms take a very long time to appear. The U.S. National Park Service states that at Saguaro National Park, branches normally begin to appear when a saguaro reaches 60 to 75 years of age. In areas of lower precipitation, it may take up to 100 years. Everything about the plant is slow. Studies in the park indicate that a saguaro grows only a few inches in the first ten years of its life, and it begins to produce flowers at about 35 years of age. An adult is generally considered to be about 125 years old. By then it may weigh 2 or more tons and be as tall as 50 feet. The average life span is probably 150 to 175 years.",Nature,nature,https://factfusionai.com/fact/a-saguaro-cactus-waits-decades-before-growing-its-first-arm/,"U.S. National Park Service",https://www.nps.gov/sagu/learn/nature/saguaro.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
118,118,"The Joshua Tree Belongs to the Agave Family","What kind of plant is a Joshua tree?","The Joshua tree was once classified as a giant lily, but modern DNA research has placed it in the Agave family.","The Agave family. The National Park Service says the Joshua tree was once classified as a giant lily, until DNA research placed it with the agaves.","The Joshua tree looks like a tree drawn from memory by someone who had never seen one. Botanically it is something else. The U.S. National Park Service states that the Joshua tree, Yucca brevifolia, was once classified as a giant lily, and that modern DNA research has placed it in the Agave family. Like the California fan palm, it is a monocot, part of the same botanical group that includes grasses and orchids. The name has a story. In the mid-19th century, Mormon settlers gave the tree its common name, believing its outstretched branches resembled the biblical Joshua guiding them westward. Joshua trees grow slowly, at about half an inch to 3 inches per year. The tallest in the park stretch over 40 feet, and the average lifespan is thought to be around 150 years.",Nature,nature,https://factfusionai.com/fact/the-joshua-tree-belongs-to-the-agave-family/,"U.S. National Park Service",https://www.nps.gov/jotr/learn/nature/jtrees.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
119,119,"Giant Sequoias Can Live for More Than 3,000 Years","How long do giant sequoias live?","Giant sequoias, the largest trees in the world, are known to reach ages of up to 3,400 years.","Up to 3,400 years. The National Park Service says giant sequoias are not the world's oldest trees, but they are known to reach that age.","Giant sequoias are the largest trees in the world, and they have time to get that way. The U.S. National Park Service states that, while not the world's oldest trees, they are known to reach ages of up to 3,400 years. They grow at middle elevations along the west slope of the Sierra Nevada. Fire is part of their life, not just a threat to it. The Park Service describes giant sequoias as adapted to periodic fire. Their bark, at up to 18 inches thick and extremely fibrous, not only resists burning but also insulates the tree against fire's heat. The evidence is written in the wood. Fire scars in tree rings dating back 2,000 years show that widespread fires occurred naturally at intervals ranging from 6 to 35 years in these forests.",Nature,nature,https://factfusionai.com/fact/giant-sequoias-can-live-for-more-than-3000-years/,"U.S. National Park Service",https://www.nps.gov/seki/learn/nature/bigtrees.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
120,120,"Petrified Wood Is Almost Solid Quartz","What is petrified wood made of?","The petrified wood of Arizona's Petrified Forest is made up of almost solid quartz, formed from logs buried over 200 million years ago.","Quartz. The National Park Service says the petrified wood in Petrified Forest National Park is almost solid quartz, colored by impurities such as iron, carbon and manganese.","Petrified wood looks like wood and weighs like stone, because stone is what it has become. The U.S. National Park Service states that the petrified wood found in Petrified Forest National Park and the surrounding region is made up of almost solid quartz. Its rainbow of colors is produced by impurities in the quartz, such as iron, carbon and manganese. The process began over 200 million years ago. Logs washed into an ancient river system and were buried quickly and deeply enough by sediment that oxygen was cut off and decay slowed. Minerals, including silica dissolved from volcanic ash, soaked into the porous wood and crystallized within it, replacing the organic material as it broke down. The logs look sawn into sections today. The Park Service explains that the brittle quartz fractured cleanly under stress as the land was uplifted.",Nature,nature,https://factfusionai.com/fact/petrified-wood-is-almost-solid-quartz/,"U.S. National Park Service",https://www.nps.gov/pefo/learn/nature/petrified-wood.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
121,121,"Glacier National Park Had About 80 Glaciers in 1850","How many glaciers did Glacier National Park have?","There were about 80 glaciers in what became Glacier National Park around 1850; by 2015 only 26 named glaciers still met the size criteria for a glacier.","About 80 around 1850, and 26 named glaciers in 2015. The National Park Service says every named glacier in the park got smaller between 1966 and 2015.","Glacier National Park was named for its many active glaciers, and it has fewer of them than it did. The U.S. National Park Service states that at the end of the Little Ice Age, around 1850, there were about 80 glaciers in what would eventually become the park. Based on aerial imagery from 2015, there were 26 named glaciers that met the size criteria of 0.1 square kilometers, which is about 25 acres. That was nine fewer than in 1966. The trend is consistent. Between 1966 and 2015, every named glacier in the park got smaller, some by more than 80 percent. The Park Service adds a caution about its own number: of the 26 remaining in 2015, some may now already be too small to be considered glaciers.",Nature,nature,https://factfusionai.com/fact/glacier-national-park-had-about-80-glaciers-in-1850/,"U.S. National Park Service",https://www.nps.gov/glac/learn/nature/glaciersoverview.htm,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
122,122,"Kelp Can Grow Up to 18 Inches in a Single Day","How fast does kelp grow?","In ideal conditions, kelp can grow up to 18 inches per day.","Up to 18 inches a day, in ideal conditions. NOAA says kelp are large brown algae that form underwater forests in cool, shallow water.","Few living things grow as fast as kelp. NOAA's National Ocean Service states that in ideal conditions kelp can grow up to 18 inches per day, in stark contrast to slow-growing corals. Kelp are not plants in the usual sense. NOAA describes them as large brown algae that live in cool, relatively shallow waters close to the shore, where they grow in dense groupings much like a forest on land. Like trees in a forest, these giant algae provide food and shelter for thousands of fish, invertebrate and marine mammal species. Sea otters, seals, sea lions and whales are among the animals that use kelp forests for protection or feeding. Because kelp depends on light for photosynthesis, the forests form in shallow open waters and are rarely found deeper than 49 to 131 feet.",Nature,nature,https://factfusionai.com/fact/kelp-can-grow-up-to-18-inches-in-a-single-day/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/kelp.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
123,123,"Most Algal Blooms in the Ocean Are Not Harmful","Are all algal blooms harmful?","Most algal blooms are beneficial, because the tiny plants are food for animals in the ocean; only a small percentage of algae produce powerful toxins.","No. NOAA says most blooms are beneficial because the algae are food for ocean animals. A small percentage of algae produce toxins, and those blooms are the ""red tides"".","News stories about a red tide make any bloom of algae sound like a disaster. NOAA's National Ocean Service gives a more balanced picture. A red tide is a common term for a harmful algal bloom, which occurs when colonies of algae grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals and birds. As the name suggests, the bloom often turns the water red. But not all algal blooms are harmful. Most blooms, in fact, are beneficial, NOAA says, because the tiny plants are food for animals in the ocean. A small percentage of algae, however, produce powerful toxins that can kill fish, shellfish, mammals and birds, and may cause illness in people. Scientists prefer the term harmful algal bloom to red tide.",Nature,nature,https://factfusionai.com/fact/most-algal-blooms-in-the-ocean-are-not-harmful/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/redtide.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
124,124,"Mauna Loa Is the Largest Active Volcano on Earth","What is the largest active volcano on Earth?","Mauna Loa in Hawaii is the largest active volcano on the planet, rising about 30,000 feet (9,144 meters) from the bottom of the sea.","Mauna Loa, in Hawaii. The National Park Service says it rises about 30,000 feet from the bottom of the sea, a greater height than Mount Everest.","Hawaii is home to a mountain that is bigger than it looks. The U.S. National Park Service states that Mauna Loa is the largest active volcano on the planet. It makes up roughly 51 percent of Hawaii Island and stands 13,681 feet, or 4,170 meters, above sea level. The Park Service calls what lies below the water more impressive: the volcano rises about 30,000 feet, or 9,144 meters, from the bottom of the sea, a greater height than Mount Everest. The name means long mountain in Hawaiian, and its broad, rounded slopes make it a classic shield volcano. It is far from quiet. According to the Park Service, Mauna Loa has erupted 34 times since 1843, averaging once every five years, and scientists believe that 90 percent of its surface is covered by flows that erupted within the past 4,000 years.",Geography,geography,https://factfusionai.com/fact/mauna-loa-is-the-largest-active-volcano-on-earth/,"U.S. National Park Service",https://www.nps.gov/havo/learn/nature/mauna-loa.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
125,125,"Water Takes About Three Months to Travel the Mississippi","How long does water take to travel the Mississippi?","It takes about three months for water leaving Lake Itasca, the source of the Mississippi River, to reach the Gulf, a journey of about 2,350 miles.","About three months. The National Park Service says that is how long water from Lake Itasca, the river's source, takes to reach the Gulf.","The Mississippi is a long river and not a fast one. The U.S. National Park Service describes it as the second longest river in North America, flowing 2,350 miles from its source at Lake Itasca through the center of the continental United States. The Missouri River, one of its tributaries, is about 100 miles longer. According to the Park Service, it takes about three months for water that leaves Lake Itasca to reach the Gulf. The pace explains why. At the headwaters, the average surface speed of the water is about 1.2 miles per hour, roughly half as fast as people walk. The length itself is not a fixed number. The Park Service notes that different agencies report 2,300, 2,320 and 2,350 miles, depending on the year and the method of measurement.",Geography,geography,https://factfusionai.com/fact/water-takes-about-three-months-to-travel-the-mississippi/,"U.S. National Park Service",https://www.nps.gov/miss/riverfacts.htm,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
126,126,"The Lowest Point in North America Is in Death Valley","What is the lowest point in North America?","Badwater Basin in Death Valley is the lowest point in North America, at 282 feet (86 meters) below sea level.","Badwater Basin, in Death Valley, at 282 feet (86 meters) below sea level, according to the National Park Service.","The lowest ground in North America is a white plain of salt. The U.S. National Park Service states that Badwater Basin is the lowest point in North America at 282 feet, or 86 meters, below sea level. The salt flats there cover nearly 200 square miles and are composed mostly of sodium chloride, which is table salt, along with calcite, gypsum and borax. The name comes with a story. According to the Park Service, stories suggest the basin earned its name when a mule belonging to an early surveyor refused to drink from the spring-fed pool there. The water is not truly bad, just very salty. Visitors can see how low they are standing. On the cliffs to the east, a sign high above marks sea level, and to the west Telescope Peak rises to 11,049 feet.",Geography,geography,https://factfusionai.com/fact/the-lowest-point-in-north-america-is-in-death-valley/,"U.S. National Park Service",https://www.nps.gov/places/badwater-basin.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
127,127,"The U.S. Shoreline Is More Than 95,000 Miles Long","How long is the U.S. shoreline?","NOAA's official value for the total length of the U.S. shoreline is 95,471 miles (153,646 kilometers).","95,471 miles, or 153,646 kilometers. That is NOAA's official value, and NOAA notes the number depends on how the shoreline is defined.","How long is the edge of a country? It depends on how closely you measure. NOAA's official value for the total length of the U.S. shoreline is 153,646 kilometers, or 95,471 miles. NOAA is open about the limits of that figure. There is no reference that designates one specific shoreline as the legal shoreline, so numbers for the length of the U.S. shoreline can vary depending on how the shoreline is defined. The official calculation uses measurements taken in 1930 to 1940 and in 1970. It includes the shorelines of the outer coast, offshore islands, sounds, bays, rivers and creeks, up to the head of the tidewater or to a point where tidal waters narrow to a width of 100 feet. The Great Lakes, measured in 1970, and outlying U.S. territories are included as well.",Geography,geography,https://factfusionai.com/fact/the-u-s-shoreline-is-more-than-95000-miles-long/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/shorelength.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
128,128,"North America Moves About as Fast as Fingernails Grow","How fast does North America move?","The North American plate moves west over the Pacific Ocean basin at roughly the rate at which fingernails grow.","About as fast as your fingernails grow. NASA says the North American plate moves west over the Pacific Ocean basin at roughly that rate.","The ground feels fixed, but it is on the move. NASA explains that Earth's lithosphere, which includes the crust and the upper mantle, is divided into huge plates that are constantly moving. For example, the North American plate moves west over the Pacific Ocean basin, roughly at a rate equal to the growth of our fingernails. Slow as that is, it shapes the planet. According to NASA, earthquakes result when plates grind past one another, ride up over one another, collide to make mountains, or split and separate. The plates are the top of a layered planet. NASA describes Earth as having four main layers: an inner core at the center, then the outer core, the mantle and the crust. On land the crust goes about 19 miles deep on average.",Geography,geography,https://factfusionai.com/fact/north-america-moves-about-as-fast-as-fingernails-grow/,NASA,https://science.nasa.gov/earth/facts/,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
129,129,"Almost All of Earth's Volcanoes Are Under the Ocean","Where are most of Earth's volcanoes?","Almost all of Earth's volcanoes are hidden under the oceans.","Under the ocean. NASA says almost all of Earth's volcanoes are hidden under the oceans, which cover about 71 percent of the planet's surface.","When people picture a volcano, they picture a mountain on land. Most volcanoes are nowhere near land. NASA states that almost all of Earth's volcanoes are hidden under the oceans. There is plenty of room for them. Earth's global ocean covers about 71 percent of the planet's surface, has an average depth of about 2.3 miles, or 3.6 kilometers, and contains 97 percent of Earth's water. NASA gives a striking example of what the water hides. Hawaii's Mauna Kea volcano is taller from base to summit than Mount Everest, but most of it is underwater. Mountains are hidden there as well. Earth's longest mountain range is also underwater, NASA notes, at the bottom of the Arctic and Atlantic oceans. Beneath the sea the crust is thinner too, only about 3 miles thick.",Geography,geography,https://factfusionai.com/fact/almost-all-of-earths-volcanoes-are-under-the-ocean/,NASA,https://science.nasa.gov/earth/facts/,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
130,130,"Honey Is Not Safe for Babies Under One Year Old","Why can't babies eat honey?","Honey can contain the bacteria that cause botulism, so it should not be fed to a child younger than 1 year old.","Because honey can contain the bacteria that cause botulism. The U.S. Centers for Disease Control and Prevention says not to feed honey to a child younger than 1 year old.","Honey is a natural food, and for most people a harmless one. Babies are the exception. The U.S. Centers for Disease Control and Prevention states plainly that honey is not safe for infants, because honey can contain the bacteria that cause botulism. Its advice is not to feed honey to a child who is younger than 1 year old. The CDC explains that infant botulism can happen if the spores of the bacteria get into an infant's intestines. The warning covers more than a spoonful of honey. The agency says not to give infants honey or products made with it, including honey pacifiers, and reports that several babies in Texas became ill with infant botulism after using honey pacifiers. The CDC also notes that most infant botulism cannot be prevented, which makes the avoidable cases worth avoiding.",Food,food,https://factfusionai.com/fact/honey-is-not-safe-for-babies-under-one-year-old/,"U.S. Centers for Disease Control and Prevention",https://www.cdc.gov/botulism/prevention/index.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
131,131,"Frozen Food Stays Safe to Eat Indefinitely","How long is frozen food safe to eat?","Food stored constantly at 0 degrees Fahrenheit will always be safe; only its quality suffers with lengthy freezer storage.","Yes, if it stays at 0 degrees Fahrenheit. The U.S. Department of Agriculture says such food will always be safe, and that only the quality suffers over time.","That forgotten package at the back of the freezer may not taste good, but age alone has not made it dangerous. The Food Safety and Inspection Service of the U.S. Department of Agriculture states that food stored constantly at 0 degrees Fahrenheit will always be safe. Only the quality suffers with lengthy freezer storage. Freezing does not sterilize food, though. According to the agency, freezing to 0 degrees inactivates any microbes present in food, including bacteria, yeasts and molds. It does not destroy them. Once thawed, these microbes can again become active, multiplying under the right conditions to levels that can lead to foodborne illness. So thawed food needs the same care as fresh food. One piece of good news: the agency says the freezing process itself does not destroy nutrients.",Food,food,https://factfusionai.com/fact/frozen-food-stays-safe-to-eat-indefinitely/,"U.S. Department of Agriculture",https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/freezing-and-food-safety,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
132,132,"Date Labels on U.S. Food Are Not Safety Dates","Are expiration dates on food about safety?","In the United States, except for infant formula, dates on food labels are not an indicator of the product's safety and are not required by federal law.","No, except on infant formula. The U.S. Department of Agriculture says food dates are about quality, are not required by federal law, and are not safety dates.","Many people treat the date on a food package as the day the food goes bad. In the United States that is not what the date means. The Food Safety and Inspection Service of the U.S. Department of Agriculture states that, except for infant formula, dates are not an indicator of the product's safety and are not required by federal law. The labels are about quality. A ""Best if Used By"" date tells consumers how long the product will be at its best quality. A ""Sell-By"" date tells the store how long to display the product. If the date passes during home storage, the agency says, a product should still be safe and wholesome if handled properly until spoilage is evident. Infant formula is the exception. Federal regulations require a ""Use-By"" date on it, and formula should not be used after that date.",Food,food,https://factfusionai.com/fact/date-labels-on-u-s-food-are-not-safety-dates/,"U.S. Department of Agriculture",https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/food-product-dating,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
133,133,"About 30 Percent of the U.S. Food Supply Is Lost or Wasted","How much food is wasted in the U.S.?","The U.S. Department of Agriculture estimates that 30 percent of the food supply is lost or wasted at the retail and consumer levels.","About 30 percent. That is the U.S. Department of Agriculture's estimate of the food supply lost or wasted at the retail and consumer levels.","A large share of the food produced in the United States is never eaten. The U.S. Department of Agriculture estimates that 30 percent of the food supply is lost or wasted at the retail and consumer levels. The department's Food Safety and Inspection Service points to one avoidable cause. One source of food waste arises from consumers or retailers throwing away wholesome food because of confusion about the meaning of dates displayed on the label. Those dates, the agency explains, are generally about quality and not safety. To reduce the confusion, it recommends that food manufacturers and retailers that apply product dating use a ""Best if Used By"" date. The reasoning is simple. Food that has passed such a date should still be safe if handled properly until spoilage is evident, so the date alone is no reason to throw it out.",Food,food,https://factfusionai.com/fact/about-30-percent-of-the-u-s-food-supply-is-lost-or-wasted/,"U.S. Department of Agriculture",https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/food-product-dating,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
134,134,"Leftovers Keep for Three to Four Days in the Refrigerator","How long do leftovers last in the fridge?","Leftovers can be kept in the refrigerator for 3 to 4 days, or frozen for 3 to 4 months.","Three to four days in the refrigerator, or three to four months in the freezer, according to the U.S. Department of Agriculture.","How long is too long for last night's dinner? The Food Safety and Inspection Service of the U.S. Department of Agriculture gives a clear answer: leftovers can be kept in the refrigerator for 3 to 4 days or frozen for 3 to 4 months. The freezer limit is about taste, not safety. Although safe indefinitely, frozen leftovers can lose moisture and flavor when stored for longer times in the freezer. After thawing, the food should be used within 3 to 4 days or can be refrozen. Reheating has a number of its own. When reheating leftovers, the agency says to be sure they reach 165 degrees Fahrenheit as measured with a food thermometer, and to bring sauces, soups and gravies to a rolling boil. It is also safe to reheat frozen leftovers without thawing them first.",Food,food,https://factfusionai.com/fact/leftovers-keep-for-three-to-four-days-in-the-refrigerator/,"U.S. Department of Agriculture",https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/leftovers-and-food-safety,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
135,135,"A Placebo May Help Even When You Know It Is a Placebo","Does a placebo work if you know it is a placebo?","Research suggests that placebos may be helpful even if patients know they are receiving placebos.","Possibly. The U.S. National Institutes of Health says one study it supported suggested placebos may help even when patients know they are receiving them.","A placebo is an inactive substance that looks like the drug or treatment being tested. It is used in what the U.S. National Institutes of Health calls the gold standard for testing treatments in people, the randomized, placebo-controlled clinical trial. People who receive a placebo sometimes get better anyway. The National Center for Complementary and Integrative Health, part of the NIH, defines the placebo effect as a beneficial health outcome resulting from a person's anticipation that an intervention will help. You might expect the effect to vanish once people are told the truth. Research supported by the center points the other way. One study suggested that placebos may be helpful even if patients know they are receiving placebos. Another supported the idea that placebo responses may occur outside of conscious awareness. These are findings from single studies, described with the word ""may"".",Psychology,psychology,https://factfusionai.com/fact/a-placebo-may-help-even-when-you-know-it-is-a-placebo/,"U.S. National Institutes of Health",https://www.nccih.nih.gov/health/placebo-effect,A,85,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
136,136,"Mild Forgetfulness Is Often a Normal Part of Aging","Is forgetfulness a normal part of aging?","Mild forgetfulness is often a normal part of aging, but dementia is not.","Often, yes. The U.S. National Institute on Aging says mild forgetfulness can be a normal part of aging, while dementia is not a normal part of aging.","Misplacing your keys at 70 feels more alarming than misplacing them at 30. The U.S. National Institute on Aging offers some reassurance. As people grow older, changes occur in all parts of the body, including the brain. Older adults may notice that it takes longer to learn something new, and they may occasionally misplace things or forget to pay a bill. According to the institute, these changes are usually signs of mild forgetfulness and are often a normal part of aging. It draws a firm line, however: forgetfulness can be a normal part of aging, but dementia is not. Serious memory problems are those that make it hard to do everyday things such as driving, using the phone and finding the way home. The institute's advice is to talk with a doctor about noticeable changes in memory.",Psychology,psychology,https://factfusionai.com/fact/mild-forgetfulness-is-often-a-normal-part-of-aging/,"U.S. National Institute on Aging",https://www.nia.nih.gov/health/memory-loss-and-forgetfulness/memory-problems-forgetfulness-and-aging,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
137,137,"Sleep May Clear Toxins From the Brain","Does sleep clean the brain?","Recent findings suggest that sleep plays a housekeeping role, removing toxins in the brain that build up while a person is awake.","It may clean the brain. The U.S. National Institutes of Health says recent findings suggest sleep removes toxins that build up in the brain while you are awake.","Everyone needs sleep, but, as the U.S. National Institute of Neurological Disorders and Stroke puts it, its biological purpose remains a mystery. One clue has emerged. The institute reports that recent findings suggest sleep plays a housekeeping role that removes toxins in your brain that build up while you are awake. The wording is careful, and ours follows it: the findings suggest this, they do not settle it. What is clear is how much depends on sleep. The institute calls quality sleep as essential to survival as food and water. Sleep is important to a number of brain functions, including how nerve cells communicate with each other, and it affects almost every type of tissue and system in the body. A chronic lack of sleep increases the risk of problems such as high blood pressure, diabetes, depression and obesity.",Psychology,psychology,https://factfusionai.com/fact/sleep-may-clear-toxins-from-the-brain/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep,A,85,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
138,138,"Your Arms and Legs Are Paralyzed While You Dream","Is your body paralyzed when you dream?","During REM sleep, the arm and leg muscles become temporarily paralyzed, which prevents a person from acting out dreams.","Yes, temporarily. The U.S. National Institutes of Health says arm and leg muscles become paralyzed during REM sleep, which stops you acting out your dreams.","Dreams can be full of running and falling, yet the dreamer lies still. The U.S. National Institute of Neurological Disorders and Stroke explains why. There are two basic types of sleep: rapid eye movement, or REM, sleep and non-REM sleep. REM sleep first occurs about 90 minutes after falling asleep. During it, your eyes move rapidly from side to side behind closed eyelids. At the same time, according to the institute, your arm and leg muscles become temporarily paralyzed, which prevents you from acting out your dreams. The brain is busy meanwhile. During most stages of sleep a part of the brain called the thalamus becomes quiet, but during REM sleep it is active, sending the cortex the images, sounds and other sensations that fill our dreams. You cycle through non-REM and REM sleep several times in a typical night.",Psychology,psychology,https://factfusionai.com/fact/your-arms-and-legs-are-paralyzed-while-you-dream/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
139,139,"The DNA in a Single Human Cell Would Stretch Six Feet","How long is the DNA in one human cell?","If all of the DNA molecules in a single human cell were unwound and placed end to end, they would stretch 6 feet.","Six feet. The U.S. National Human Genome Research Institute says that is how far the DNA in a single human cell would stretch if unwound and placed end to end.","A human cell is far too small to see, yet it holds a surprising length of DNA. The U.S. National Human Genome Research Institute states that if all of the DNA molecules in a single human cell were unwound and placed end-to-end, they would stretch 6 feet. It fits because of the way it is packed. The DNA is carried in chromosomes, thread-like structures located inside the nucleus of the cell. Each chromosome is made of protein and a single molecule of DNA. According to the institute, the unique structure of chromosomes keeps DNA tightly wrapped around spool-like proteins called histones. The packing matters for more than saving space. Cells must constantly divide to replace old, worn-out cells, and chromosomes are a key part of the process that ensures DNA is accurately copied and distributed when they do.","Human Body",human-body,https://factfusionai.com/fact/the-dna-in-a-single-human-cell-would-stretch-six-feet/,"U.S. National Institutes of Health",https://www.genome.gov/about-genomics/fact-sheets/Chromosomes-Fact-Sheet,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
140,140,"Humans Have 46 Chromosomes, in 23 Pairs","How many chromosomes do humans have?","Humans have 23 pairs of chromosomes, for a total of 46.","46, in 23 pairs. The U.S. National Human Genome Research Institute says females have two X chromosomes and males have one X and one Y.","Every species has its own number of chromosomes, the structures that carry DNA inside cells. The U.S. National Human Genome Research Institute states that humans have 23 pairs of chromosomes, for a total of 46. The number says nothing about how complex a creature is. The institute notes that a fruit fly has four pairs of chromosomes, a rice plant has 12 and a dog has 39. One human pair differs between the sexes. These are the sex chromosomes: females have two X chromosomes in their cells, while males have one X and one Y. Not every cell carries pairs. The only human cells that do not are the reproductive cells, which carry just one copy of each chromosome. The word itself comes from the Greek for color and body, because chromosomes are strongly stained by some dyes used in research.","Human Body",human-body,https://factfusionai.com/fact/humans-have-46-chromosomes-in-23-pairs/,"U.S. National Institutes of Health",https://www.genome.gov/about-genomics/fact-sheets/Chromosomes-Fact-Sheet,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
141,141,"All Humans Are 99.9 Percent Genetically Identical","How genetically similar are all humans?","All human beings are 99.9 percent identical in their genetic makeup.","99.9 percent. The U.S. National Human Genome Research Institute says all human beings are that similar, and that the remaining 0.1 percent holds clues about disease.","People differ in countless visible ways, but at the level of DNA those differences are small. The U.S. National Human Genome Research Institute states that all human beings are 99.9 percent identical in their genetic makeup. The remainder still matters. According to the institute, differences in the remaining 0.1 percent hold important clues about the causes of diseases. Studying them is the work of two related fields. Genetics refers to the study of genes and the way certain traits or conditions are passed down from one generation to another. Genomics is a more recent term that describes the study of all of a person's genes, the genome, including how those genes interact with each other and with the person's environment. The institute says genomics is helping researchers discover why some people get sick from certain infections and behaviors while others do not.","Human Body",human-body,https://factfusionai.com/fact/all-humans-are-99-9-percent-genetically-identical/,"U.S. National Institutes of Health",https://www.genome.gov/about-genomics/fact-sheets/Genetics-vs-Genomics,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
142,142,"About 1 in 12 Men Have Color Vision Deficiency","How many men are color blind?","About 1 in 12 men have color vision deficiency, commonly called color blindness, and men have a much higher risk than women.","About 1 in 12. The U.S. National Eye Institute says men have a much higher risk than women, and that the most common type makes red and green hard to tell apart.","Color blindness is more common than many people assume, at least among men. The U.S. National Eye Institute states that about 1 in 12 men have color vision deficiency, and that men have a much higher risk than women. The term color blindness is slightly misleading. According to the institute, having color vision deficiency means you see colors differently than most people, and most of the time it makes it hard to tell the difference between certain colors. The most common type makes it hard to tell red from green. Only in rare cases do people not see color at all. Most people who have the condition are born with it, because the most common types are genetic and passed down from parents. There is no cure, the institute says, but special glasses and contact lenses can help.","Human Body",human-body,https://factfusionai.com/fact/about-1-in-12-men-have-color-vision-deficiency/,"U.S. National Eye Institute",https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/color-blindness,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
143,143,"New Blood Cells Are Made Inside Your Bones","Where are blood cells made?","New blood cells are made inside bone marrow, a jelly-like material found inside some types of bone.","In bone marrow. The U.S. National Institutes of Health describes it as a jelly-like material inside some types of bone, where new blood cells are made.","Bones do more than hold you up. The National Institute of Arthritis and Musculoskeletal and Skin Diseases, part of the U.S. National Institutes of Health, explains that some types of bone have a jelly-like material inside called bone marrow, and that new blood cells are made inside the bone marrow. Making blood is not the only extra job. Bones can store minerals like calcium and phosphorus, and release them when the body needs them. They are made mostly of a protein called collagen and a mineral called calcium phosphate, which together make bones strong and flexible. Bones also change with use. According to the institute, when you are young, new bone is made faster than old bone is broken down, and bones respond to exercise by making new bone tissue.","Human Body",human-body,https://factfusionai.com/fact/new-blood-cells-are-made-inside-your-bones/,"National Institutes of Health (NIAMS)",https://www.niams.nih.gov/health-topics/educational-resources/health-lesson-learning-about-bones,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
144,144,"Three Tiny Bones in Your Ear Make Sounds Louder","What are the three bones in the ear?","Three tiny bones in the middle ear, the malleus, incus and stapes, amplify sound vibrations and pass them to the inner ear.","The malleus, incus and stapes. The U.S. National Institutes of Health says these three tiny bones amplify sound vibrations and send them to the cochlea.","Hearing depends on a chain of small moving parts. The National Institute on Deafness and Other Communication Disorders, part of the U.S. National Institutes of Health, describes the steps. Sound waves enter the outer ear and travel through the ear canal to the eardrum. The eardrum vibrates and sends these vibrations to three tiny bones in the middle ear, called the malleus, incus and stapes. According to the institute, these bones amplify, or increase, the sound vibrations and send them to the cochlea, a snail-shaped structure filled with fluid in the inner ear. There the vibrations make the fluid ripple, and sensory cells called hair cells turn the movement into an electrical signal. The auditory nerve carries this signal to the brain, which turns it into a sound that we recognize and understand.","Human Body",human-body,https://factfusionai.com/fact/three-tiny-bones-in-your-ear-make-sounds-louder/,"U.S. National Institutes of Health",https://www.nidcd.nih.gov/health/how-do-we-hear,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
145,145,"Horseshoe Crabs Are Closer to Spiders Than to Crabs","Are horseshoe crabs really crabs?","Horseshoe crabs are not really crabs: they are more closely related to spiders and scorpions.","No. NOAA says horseshoe crabs are not crustaceans and are more closely related to spiders and scorpions than they are to crabs.","The horseshoe crab has the wrong name. NOAA's National Ocean Service states that, despite their common name, horseshoe crabs are not really crabs, which are crustaceans, but are more closely related to spiders and scorpions. They are also very old. Atlantic horseshoe crabs have been called living fossils because, according to NOAA, they predate the dinosaurs by more than 200 million years. These animals swarm U.S. coastlines each summer from Maine to Mexico, and Delaware Bay has the largest population of horseshoe crabs in the world. Other animals depend on them. More than 20 species of migratory birds, along with loggerhead sea turtles and many kinds of fish and crabs, rely on the crabs' eggs as an annual boost to their diets. NOAA notes that horseshoe crab numbers declined in the 1990s and that populations are recovering.",Weird,weird,https://factfusionai.com/fact/horseshoe-crabs-are-closer-to-spiders-than-to-crabs/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/horseshoe-crab.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
146,146,"Blue Horseshoe Crab Blood Is Used to Test Medicines","Why is horseshoe crab blood used in medicine?","Horseshoe crabs have blue, copper-based blood that clots in the presence of bacterial toxins, and medical researchers use it to test drugs, vaccines and medical devices.","Because it clots quickly when it meets bacterial toxins. NOAA says researchers use the blue, copper-based blood to check that drugs, vaccines and devices are free of contamination.","Few people realize how important horseshoe crabs are to modern medicine, says NOAA's National Ocean Service. The reason is their blood. It is blue and copper-based, and it quickly clots in the presence of bacterial toxins. Because of that reaction, medical researchers use it to test intravenous drugs, vaccines and medical devices, ensuring that they are free of bacterial contamination. Collecting the blood does not require killing the animals. According to NOAA, every year many thousands of horseshoe crabs are harvested from their habitats, bled of about one-third of their blood, and then returned to the beach relatively unharmed. The crabs face other pressures. NOAA lists habitat loss and high demand as commercial bait as continuing concerns, and notes that some states forbid or restrict harvesting. Scientists help to conduct annual spawning surveys around Delaware Bay.",Weird,weird,https://factfusionai.com/fact/blue-horseshoe-crab-blood-is-used-to-test-medicines/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/horseshoe-crab.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
147,147,"Fish Rest, but They Do Not Sleep the Way We Do","Do fish sleep?","Fish do not sleep in the same way that land mammals sleep, but most fish do rest, reducing their activity and metabolism while remaining alert to danger.","In a way. NOAA says most fish rest by reducing their activity and metabolism while staying alert to danger, which is different from the sleep of land mammals.","Do fish sleep? NOAA's National Ocean Service answers with care. While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. NOAA suggests these periods may perform the same restorative functions as sleep does in people, and it puts the word sleep in quotation marks when it applies it to fish. How they rest varies. Some fish float in place. Some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest. NOAA gives the example of the Pacific sand lance, which burrows into sand to rest, conserve energy and avoid predators. The agency adds that the nature of fish sleep is an area of active research, so the picture may change.",Weird,weird,https://factfusionai.com/fact/fish-rest-but-they-do-not-sleep-the-way-we-do/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/fish-sleep.html,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
148,148,"Sea Sponges Are Animals, Not Plants","Are sea sponges animals or plants?","Sponges are simple aquatic animals that are often mistaken for plants, and some have a fossil record dating back about 600 million years.","Animals. NOAA says sponges are simple aquatic animals, often mistaken for plants, with a fossil record going back about 600 million years.","A sponge sits in one place and has no face, so it is easy to take it for a plant. NOAA's National Ocean Service says otherwise. Sponges are simple aquatic animals with dense, yet porous, skeletons. They come in a wide variety of colors, shapes and sizes and are often mistaken for plants. They are also among the oldest kinds of animal. According to NOAA, certain species have a fossil record that dates back approximately 600 million years, to the earliest period of Earth's history. There are approximately 8,550 living sponge species. Most are found in the ocean, though numerous species live in fresh water as well. They are very simple creatures with no tissues, yet they matter to their neighbors. NOAA notes that sponges filter water and collect bacteria, which can affect water quality on a coral reef.",Weird,weird,https://factfusionai.com/fact/sea-sponges-are-animals-not-plants/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/sponge.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
149,149,"More Than 12 Million Immigrants Passed Through Ellis Island","How many immigrants passed through Ellis Island?","From 1892 to 1924, Ellis Island was America's largest and most active immigration station, where over 12 million immigrants were processed.","Over 12 million. The National Park Service says they were processed at Ellis Island between 1892 and 1924, when it was America's largest immigration station.","For a generation, one small island in New York Harbor was the front door of the United States. The U.S. National Park Service states that from 1892 to 1924, Ellis Island was America's largest and most active immigration station, where over 12 million immigrants were processed. The stop was shorter than its place in memory suggests. On average, according to the Park Service, the inspection process took approximately 3 to 7 hours. For most of the people who went through it, the outcome was a good one. The Park Service says that for the vast majority of immigrants, Ellis Island truly was an Island of Hope, the first stop on their way to new opportunities and experiences in America. It describes the island as a speck of land that people have used for hundreds of years.",History,history,https://factfusionai.com/fact/more-than-12-million-immigrants-passed-through-ellis-island/,"U.S. National Park Service",https://www.nps.gov/elis/learn/historyculture/index.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
150,150,"The Statue of Liberty's Skin Is as Thin as Two Pennies","How thick is the Statue of Liberty's copper skin?","The copper sheeting of the Statue of Liberty is 3/32 of an inch thick, the thickness of two pennies placed together.","3/32 of an inch, the thickness of two pennies placed together, according to the National Park Service. The copper weighs 176,000 pounds in total.","The Statue of Liberty looks as solid as a mountain. Its surface is closer to a shell. The U.S. National Park Service lists the thickness of the statue's copper sheeting as 3/32 of an inch, the thickness of two pennies placed together. There is a great deal of that thin metal, with the copper weighing 176,000 pounds. The statue is not rigid, either. According to the Park Service, it can sway up to 3 inches in the wind, and the torch up to 6 inches. The same list of statistics holds other details that are easy to miss from the ground. Twenty-five windows and seven rays make up the crown. The tablet reads July 4, 1776, in Roman numerals. Chains and a broken shackle lie at the statue's feet, where they cannot be seen from below.",History,history,https://factfusionai.com/fact/the-statue-of-libertys-skin-is-as-thin-as-two-pennies/,"U.S. National Park Service",https://www.nps.gov/stli/learn/historyculture/statue-statistics.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
151,151,"Bats Are the Only Mammals That Can Truly Fly","Which mammals can truly fly?","Bats are the only true flying mammals.","Bats. The National Park Service says bats are the only true flying mammals.","Plenty of animals glide, but only one group of mammals truly flies. The U.S. National Park Service states that bats are the only true flying mammals. They are mammals in every other way, too. The Park Service lists what that means: bats give live birth to their young and do not lay eggs, they are warm-blooded, they have fur rather than feathers, and baby bats, called pups, are fed breast milk by their mothers. Carlsbad Caverns National Park is famous for them. Its large colony of Brazilian free-tailed bats draws visitors every evening from spring through fall for spectacular outflights. Each of those bats weighs about half an ounce, the weight of three nickel coins. Bats face a serious threat. A fungus called White-nose Syndrome has killed an estimated 7 million or more bats in the United States.",Animal,animal,https://factfusionai.com/fact/bats-are-the-only-mammals-that-can-truly-fly/,"U.S. National Park Service",https://www.nps.gov/cave/learn/nature/bats.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
152,152,"Only South Florida Has Both Alligators and Crocodiles","Where do alligators and crocodiles live together?","South Florida is the only place where the American alligator and the American crocodile coexist.","South Florida. The National Park Service says it is the only place where America's two native crocodilians, the alligator and the crocodile, live side by side.","There are 23 different species of crocodilians in the world, according to the U.S. National Park Service, and 2 of them are native to the United States. South Florida is the only place where both of these species coexist. The two are easy to confuse at first glance. The American crocodile has lighter skin and a narrower, triangular snout, and the fourth tooth on both sides of its lower jaw is visible when its mouth is closed. The American alligator is darker, with a broader snout. They also prefer different water. Alligators are typically found in freshwater habitats and are more numerous in Florida, while crocodiles are rare and secretive creatures of coastal, brackish and salt water. The Park Service notes that the Florida crocodile population has grown enough for its status to change from endangered to threatened.",Animal,animal,https://factfusionai.com/fact/only-south-florida-has-both-alligators-and-crocodiles/,"U.S. National Park Service",https://www.nps.gov/ever/learn/nature/crocodile.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
153,153,"How to Tell a Dolphin From a Porpoise: Look at the Teeth","What is the difference between a dolphin and a porpoise?","Dolphins tend to have cone-shaped teeth and prominent beaks, while porpoises have smaller mouths and spade-shaped teeth.","Look at the teeth and the face. NOAA says dolphins have cone-shaped teeth and long beaks, while porpoises have spade-shaped teeth and smaller mouths.","People often use the words dolphin and porpoise as if they meant the same animal. NOAA's National Ocean Service explains how to tell them apart. It comes down to faces, fins and figures. Dolphins tend to have prominent, elongated beaks and cone-shaped teeth, while porpoises have smaller mouths and spade-shaped teeth. A dolphin's dorsal fin, the one in the middle of the back, is hooked or curved, while a porpoise's is triangular. Generally, dolphin bodies are leaner and porpoises' are portly. Dolphins are also far more common. According to NOAA, most scientists agree there are 32 dolphin species, plus five closely related species of river dolphin, and only six porpoise species. One famous animal belongs firmly with the dolphins: the orca, or killer whale, is the largest member of the dolphin family.",Animal,animal,https://factfusionai.com/fact/how-to-tell-a-dolphin-from-a-porpoise-look-at-the-teeth/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/dolphin_porpoise.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
154,154,"Belugas Can Turn Their Heads, Unlike Most Whales","Why can beluga whales turn their heads?","Unlike other dolphins and whales, beluga whales have neck vertebrae that are not fused, so they can nod and turn their heads from side to side.","Because their neck bones are not fused. NOAA Fisheries says that lets belugas nod and move their heads from side to side, unlike other whales and dolphins.","Most whales and dolphins cannot turn their heads. The beluga can. NOAA Fisheries explains that, unlike other dolphins and whales, the beluga's neck vertebrae are not fused, allowing belugas to nod and move their heads from side to side. Belugas are distinctive in other ways. They are known for their white color, although they are dark gray as calves and their skin lightens as they age. On top of the head is a round, flexible melon that focuses and modulates their sounds, including echolocation clicks. Those sounds earned them a nickname. Belugas produce whistles, squeals, moos, chirps and clicks, which is why they are called the canaries of the sea. They live in the Arctic Ocean and nearby seas, swimming among ice floes where the water may be as cold as 32 degrees Fahrenheit.",Animal,animal,https://factfusionai.com/fact/belugas-can-turn-their-heads-unlike-most-whales/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/beluga-whale,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
155,155,"Hawaiian Monk Seals Live Nowhere Else on Earth","Where do Hawaiian monk seals live?","Hawaiian monk seals are endemic to the Hawaiian archipelago, occurring nowhere else in the world; their population is estimated at around 1,600.","Only in Hawaii. NOAA Fisheries says Hawaiian monk seals occur nowhere else in the world and estimates the population at around 1,600 seals.","Some animals are found across whole oceans. The Hawaiian monk seal has one home. NOAA Fisheries states that Hawaiian monk seals are endemic to the Hawaiian archipelago, occurring nowhere else in the world, from the main Hawaiian Islands to the Northwestern Hawaiian Islands of Papahānaumokuākea Marine National Monument. There are very few of them. NOAA Fisheries estimates the population at around 1,600 seals, nearly 1,200 of them in Papahānaumokuākea and about 400 in the main islands, and calls the species one of the most endangered seals in the world. Their history explains why. Seal hunting in the mid-19th century reduced them to near extinction. They recovered by the late 1950s, then began a long decline. Since 2013 the population has been increasing again, but it is still only about a third of its historic size.",Animal,animal,https://factfusionai.com/fact/hawaiian-monk-seals-live-nowhere-else-on-earth/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/hawaiian-monk-seal,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
156,156,"The Steller Sea Lion Is the Largest of the Eared Seals","What is the largest eared seal?","The Steller sea lion is the largest member of the eared seal family, which includes all sea lions and fur seals; males can weigh up to 2,500 pounds.","The Steller sea lion. NOAA Fisheries says it is the largest of the ""eared seals"", with males weighing up to 2,500 pounds.","Sea lions and fur seals belong to a family known as the eared seals. NOAA Fisheries states that the Steller, or northern, sea lion is the largest member of that family. Males can weigh up to 2,500 pounds and reach about 11 feet in length, while females weigh up to 800 pounds and reach about 9.5 feet. They do not sound like the sea lions people know from harbors and aquariums. According to NOAA Fisheries, the Steller sea lion's low-frequency calls sound more like roars than the barks of the smaller California sea lion. The species is named for Georg Wilhelm Steller, the German naturalist on the Bering expedition who first described it in 1742. Steller sea lions live along the coasts of the North Pacific Ocean, and they were first listed under the Endangered Species Act in 1990 after unexplained declines in Alaska.",Animal,animal,https://factfusionai.com/fact/the-steller-sea-lion-is-the-largest-of-the-eared-seals/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/steller-sea-lion,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
157,157,"The Loggerhead Turtle Is Named for Its Huge Head","Why is it called a loggerhead turtle?","The loggerhead turtle is named for its large head, which supports powerful jaw muscles for eating hard-shelled prey such as whelks and conch.","Its big head. NOAA Fisheries says the loggerhead's large head supports powerful jaws used to crush hard-shelled prey such as whelks and conch.","Some animal names are puzzles. The loggerhead's is not. NOAA Fisheries states that the loggerhead turtle is named for its large head, which supports powerful jaw muscles that let it feed on hard-shelled prey such as whelks and conch. In the United States it is the sea turtle people are most likely to meet. NOAA Fisheries calls loggerheads the most abundant species of sea turtle found in U.S. coastal waters, and the most abundant that nests in the United States. Many adults that nest on U.S. beaches migrate from neighboring nations such as the Bahamas, Cuba and Mexico. Florida matters to them worldwide. According to NOAA Fisheries, only two loggerhead nesting groups have more than 10,000 females nesting each year: Peninsular Florida and Oman. The loggerhead's lifespan is unknown, but it is estimated at 70 years or more.",Animal,animal,https://factfusionai.com/fact/the-loggerhead-turtle-is-named-for-its-huge-head/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/loggerhead-turtle,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
158,158,"A Pacific Bluefin Tuna Can Weigh Nearly 1,000 Pounds","How much can a Pacific bluefin tuna weigh?","The maximum reported size for a Pacific bluefin tuna is 3 meters (9.8 feet) long and 450 kilograms (990 pounds).","Up to 990 pounds. NOAA Fisheries gives the maximum reported size of a Pacific bluefin tuna as 3 meters (9.8 feet) and 450 kilograms.","The tuna in a can gives little idea of the fish it came from. NOAA Fisheries states that the maximum reported length and weight for the Pacific bluefin tuna are 3 meters, or 9.8 feet, and 450 kilograms, or 990 pounds. Those are record figures. A typical adult is about 1.5 meters long and weighs about 60 kilograms, or 130 pounds. Pacific bluefin reach maturity at about 5 years of age and can live up to 26 years, although the average lifespan is about 15. They are great travelers. NOAA Fisheries says that, of all the tunas, Pacific bluefin have the largest geographic range, migrating thousands of miles across oceans and international borders. That makes them hard to manage, because many nations fish them, so two international organizations coordinate the fishery across the Pacific.",Animal,animal,https://factfusionai.com/fact/a-pacific-bluefin-tuna-can-weigh-nearly-1000-pounds/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/pacific-bluefin-tuna,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
159,159,"The Vaquita Is the Most Endangered Marine Mammal","What is the most endangered marine mammal?","The vaquita, a small porpoise that lives only in the northern Gulf of California, is the most endangered of the world's marine mammals.","The vaquita, a small porpoise. NOAA Fisheries calls it the most endangered of the world's marine mammals and says it lives only in the northern Gulf of California.","The vaquita is a shy member of the porpoise family, and NOAA Fisheries calls it the most endangered of the world's marine mammals. It is small, at about 5 feet long, one of the smallest members of the whale, dolphin and porpoise family. Its home is tiny too. The vaquita has the smallest range of any whale, dolphin or porpoise, and lives only in the northern part of the Gulf of California in Mexico. Its decline is tied to fishing. NOAA Fisheries explains that the drop in vaquita numbers is related to the totoaba, a large fish that also lives only in the Gulf of California and is fished illegally. Mexico has responded with gillnet bans, including a 2017 agreement that permanently banned most gillnets within the vaquita's range. Females are thought to give birth to a single calf every other year.",Animal,animal,https://factfusionai.com/fact/the-vaquita-is-the-most-endangered-marine-mammal/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/vaquita,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
160,160,"Elk Antlers Can Grow Two-Thirds of an Inch a Day","How fast do elk antlers grow?","During the fastest part of their growth, the antlers of a mature bull elk grow about two-thirds of an inch each day.","About two-thirds of an inch a day. The National Park Service says that is how fast a mature bull elk's antlers grow late in their growing period.","A bull elk grows a new set of antlers every year, and quickly. The U.S. National Park Service explains that most bulls in Yellowstone drop their antlers in March and April, and new growth begins soon after. The antler-growing period lasts about 90 days for yearling bulls and about 140 days for healthy, mature bulls. Most of the work comes at the end. Roughly 70 percent of the antler growth takes place in the last half of the period, when the antlers of a mature bull grow two-thirds of an inch each day. Growing antlers are covered in a fuzzy skin called velvet, and blood flowing in that skin deposits the calcium that makes the antler. The result is substantial. A typical healthy bull's antlers are 55 to 60 inches long, just under six feet wide, and weigh about 30 pounds per pair.",Animal,animal,https://factfusionai.com/fact/elk-antlers-can-grow-two-thirds-of-an-inch-a-day/,"U.S. National Park Service",https://www.nps.gov/yell/learn/nature/elk.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
161,161,"Killer Whales Are One of the Few Species With Menopause","Do killer whales go through menopause?","Killer whales are one of the few species known to undergo menopause, along with humans and several other toothed whales.","Yes. NOAA Fisheries lists killer whales among the species known to undergo menopause, with humans, belugas, narwhals and a few other toothed whales.","Menopause is rare in the animal world. NOAA Fisheries lists the species known to undergo it: humans, killer whales, false killer whales, beluga whales, narwhals, short-finned pilot whales and, likely, bottlenose dolphins. It adds that other long-lived marine mammals may plausibly experience it too. Long lives are part of the picture for killer whales. According to NOAA Fisheries, females typically live about 50 years in the wild but can live to at least 90, while males average about 30 years and can live to at least 60. Females reach sexual maturity between 10 and 13 years old. Family matters a great deal. Most killer whales live in pods, groups of maternally related individuals seen together more than half the time, and calves stay closely associated with their mothers for at least their first two years.",Animal,animal,https://factfusionai.com/fact/killer-whales-are-one-of-the-few-species-with-menopause/,"NOAA Fisheries",https://www.fisheries.noaa.gov/species/killer-whale,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
162,162,"Pronghorn Shed and Regrow Their Horn Sheaths Every Year","How often do pronghorn shed their horns?","Pronghorn have true horns, but unlike other horned animals they shed and regrow the horn sheaths every year.","Every year. The National Park Service says pronghorn shed their horn sheaths annually, which sets them apart from other animals with true horns.","Antlers fall off every year, horns usually do not. The pronghorn breaks that rule. The U.S. National Park Service explains that pronghorn have true horns, made of modified, fused hair growing over permanent bony cores, but they differ from those of other horned animals in two major ways: the sheaths are shed and grown every year, and they are pronged. Some other horned mammals occasionally shed their horns, the Park Service notes, but not annually. The timing is regular. Males usually shed the sheaths in November or December and begin growing the next year's set in February or March, reaching maximum development in August or September. Adult males typically have horns 10 to 16 inches long. About 70 percent of females also have horns, but they average only 1 to 2 inches and are not pronged.",Animal,animal,https://factfusionai.com/fact/pronghorn-shed-and-regrow-their-horn-sheaths-every-year/,"U.S. National Park Service",https://www.nps.gov/yell/learn/nature/pronghorn.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
163,163,"Less Than 0.001 Percent of the Deep Seafloor Has Been Seen","How much of the ocean floor has been explored?","Explorers have seen less than 0.001 percent of the deep ocean seafloor, an area roughly the size of Rhode Island.","Less than 0.001 percent. NOAA Ocean Exploration says that is how much of the deep seafloor explorers have actually seen, roughly the size of Rhode Island.","The whole seafloor has been mapped, in a sense. NOAA Ocean Exploration explains that satellite data cover all of it, but only as a general picture in which features like seamounts and shipwrecks remain unseen. Detailed mapping is further behind. As of April 2026, 28.7 percent of the global seafloor had been mapped with modern high-resolution sonar, usually mounted on ships. Seeing it is another matter. In NOAA's words, we cannot say we have explored the seafloor until we have seen it, and explorers have seen less than 0.001 percent of the deep ocean seafloor, roughly the size of Rhode Island. That leaves a great deal, because more than 90 percent of the ocean is deep ocean, deeper than 200 meters. NOAA adds a sober conclusion: the ocean will never be fully explored.",Ocean,ocean,https://factfusionai.com/fact/less-than-0-001-percent-of-the-deep-seafloor-has-been-seen/,"Bell et al. (2025), Science Advances | NOAA Ocean Exploration","https://marineinfo.org/doc/publication/408357 | https://oceanexplorer.noaa.gov/ocean-fact/explored/","A | A",90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
164,164,"About 97 Percent of Earth's Water Is in the Ocean","How much of Earth's water is in the ocean?","About 97 percent of Earth's water is in the ocean, and less than one percent of all the water on Earth is fresh.","About 97 percent. NOAA says the ocean holds about 97 percent of Earth's water, and that less than one percent of all water on Earth is fresh.","Earth is a watery planet, and nearly all of that water is salty. NOAA's National Ocean Service states that about 97 percent of Earth's water can be found in the ocean. Of the small share that is not in the ocean, about two percent is frozen in glaciers and ice caps, and less than one percent of all the water on Earth is fresh. A tiny fraction exists as water vapor in the air. NOAA puts numbers to the total. According to the U.S. Geological Survey, there are over 1,386,000,000 cubic kilometers of water on the planet, and NOAA's National Geophysical Data Center estimates that 1,335,000,000 cubic kilometers of it is in the ocean. NOAA offers a homely comparison: that is enough water to fill about 352,670,000,000,000,000,000 gallon-sized milk containers.",Ocean,ocean,https://factfusionai.com/fact/about-97-percent-of-earths-water-is-in-the-ocean/,"NOAA National Ocean Service | USGS Water Science School","https://oceanservice.noaa.gov/facts/oceanwater.html | https://www.usgs.gov/special-topics/water-science-school/science/where-earths-water","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
165,165,"Rogue Waves Are Over Twice the Size of Nearby Waves","What is a rogue wave?","Rogue waves, which scientists call extreme storm waves, are waves greater than twice the size of the surrounding waves.","More than twice the size of the waves around them. NOAA says scientists call them extreme storm waves, and that they often come from unexpected directions.","For centuries sailors told stories of sudden walls of water appearing out of nowhere. NOAA's National Ocean Service says these rogue, freak or killer waves were part of marine folklore for centuries, but have only been accepted as real by scientists over the past few decades. Scientists call them extreme storm waves and define them as waves greater than twice the size of surrounding waves. They are very unpredictable and often come unexpectedly from directions other than the prevailing wind and waves. Witnesses describe them as walls of water, often steep-sided with unusually deep troughs. NOAA's page shows one estimated at 60 feet, or 18.3 meters, in the Gulf Stream off Charleston, South Carolina. Exactly how and when rogue waves form is still under investigation, although several causes are known.",Ocean,ocean,https://factfusionai.com/fact/rogue-waves-are-over-twice-the-size-of-nearby-waves/,"NOAA National Ocean Service | Teutsch et al. (2020), Natural Hazards and Earth System Sciences","https://oceanservice.noaa.gov/facts/roguewaves.html | https://nhess.copernicus.org/articles/20/2665/2020/","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
166,166,"Water Pressure Rises One Atmosphere Every 33 Feet Down","How much does water pressure increase with depth?","In the ocean, pressure increases by one atmosphere for every 33 feet (10.06 meters) of depth.","One atmosphere for every 33 feet. NOAA says that is how fast water pressure increases as you go deeper in the ocean.","At sea level, the air around us presses on our bodies at 14.7 pounds per square inch, a pressure called one atmosphere. Underwater it climbs fast. NOAA's National Ocean Service states that for every 33 feet, or 10.06 meters, you go down, the pressure increases by one atmosphere. You can feel the increase on your eardrums. Many sea animals have no trouble with it. NOAA explains that whales can withstand dramatic pressure changes because their bodies are more flexible. Their ribs are bound by loose, bendable cartilage, which lets the rib cage collapse at pressures that would easily snap our bones, and their lungs can collapse safely as well, which keeps them from rupturing. That flexibility, according to NOAA, allows sperm whales to hunt for giant squid at depths of 7,000 feet or more.",Ocean,ocean,https://factfusionai.com/fact/water-pressure-rises-one-atmosphere-every-33-feet-down/,"NOAA National Ocean Service | NOAA Pacific Marine Environmental Laboratory","https://oceanservice.noaa.gov/facts/pressure.html | https://pmel.noaa.gov/eoi/nemo1998/education/pressure.html","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
167,167,"Bleached Coral Is Not Dead, but It Is in Danger","Is bleached coral dead?","When corals are stressed, they expel the algae living in their tissues and turn white; a bleached coral is not dead, but it may die if the stress continues.","No. NOAA says a bleached coral is not dead: it has expelled the algae living in its tissues. If the stress continues, though, the coral eventually dies.","White coral looks like a skeleton, but bleaching is not the same as death. NOAA's National Ocean Service explains that when corals are stressed by changes in temperature, light or nutrients, they expel the symbiotic algae living in their tissues, which causes them to turn completely white. When a coral bleaches, NOAA says, it is not dead. If the stress is not severe, corals have been known to recover. If the loss of algae is prolonged and the stress continues, the coral eventually dies. Warm water is the usual cause, but not the only one. In January 2010, cold water in the Florida Keys caused a bleaching event that killed some coral. The damage can be large. NOAA reports that in 2005 the United States lost half of its coral reefs in the Caribbean in one year because of a massive bleaching event.",Ocean,ocean,https://factfusionai.com/fact/bleached-coral-is-not-dead-but-it-is-in-danger/,"NOAA Climate.gov | NOAA National Ocean Service","https://www.climate.gov/news-features/featured-images/noaa%E2%80%99s-coral-bleaching-outlook | https://oceanservice.noaa.gov/facts/coral_bleach.html","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
168,168,"Kelp Forests Are Among the Most Diverse Places in the Ocean","Why are kelp forests important?","Kelp forests harbor a greater variety and higher diversity of plants and animals than almost any other ocean community.","Kelp forests. NOAA says they harbor a greater variety of plants and animals than almost any other ocean community.","Coral reefs get most of the attention, but NOAA's National Ocean Service gives kelp forests a remarkable rating: they harbor a greater variety and higher diversity of plants and animals than almost any other ocean community. Kelp are large brown algae that grow in dense groupings in cool, shallow water close to shore, much like a forest on land. These underwater towers provide food and shelter for thousands of species of fish, invertebrates and marine mammals. Visitors come from above the water too. NOAA lists seals, sea lions, whales, sea otters, gulls, terns, snowy egrets, great blue herons, cormorants and shore birds among the animals that use kelp forests for protection or feeding. The forests change with the seasons. Storms can tear and dislodge the kelp in winter, leaving a tattered forest that grows again each spring.",Ocean,ocean,https://factfusionai.com/fact/kelp-forests-are-among-the-most-diverse-places-in-the-ocean/,"NOAA National Ocean Service | NOAA Office of National Marine Sanctuaries","https://oceanservice.noaa.gov/facts/kelp.html | https://sanctuaries.noaa.gov/visit/ecosystems/kelpdesc.html","A | A",90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
169,169,"No One Died Carving Mount Rushmore","Did anyone die building Mount Rushmore?","During the 14 years of construction of Mount Rushmore, from 1927 to 1941, not one worker was killed.","No one. The National Park Service says not one fatality occurred during the 14 years of construction, even though 90 percent of the mountain was carved with dynamite.","Carving four presidents into a mountain was dangerous work. The U.S. National Park Service says 90 percent of Mount Rushmore was carved using dynamite, with powdermen setting charges sized to remove precise amounts of rock. Drillers were raised and lowered by workers hand-cranking winches on top of the mountain, through weather that ranged from blazing hot to bitter cold. Yet, according to the Park Service, during the 14 years of construction, from October 4, 1927, to October 31, 1941, not one fatality occurred. The project involved nearly 400 men and women. Dynamite was used until only three to six inches of rock remained, and the faces were then smoothed by hand. Many workers were uneasy with heights, the Park Service notes, but during the Depression any job was a good job. One earned 8 dollars a day.",History,history,https://factfusionai.com/fact/no-one-died-carving-mount-rushmore/,"U.S. National Park Service",https://www.nps.gov/moru/learn/historyculture/carving-history.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
170,170,"The Washington Monument Was the World's Tallest Building","Was the Washington Monument the tallest building in the world?","When it was completed in 1884, the Washington Monument was the tallest building in the world, at 555 feet, 5-1/8 inches.","Yes. The National Park Service says that on its completion in 1884, at 555 feet, 5-1/8 inches, it was the tallest building in the world.","The tallest building on Earth once stood in Washington, D.C. The U.S. National Park Service states that the Washington Monument was the tallest building in the world upon its completion in 1884, standing 555 feet, 5-1/8 inches. In reaching that height it surpassed the Cologne Cathedral. The number was not chosen at random. The original plan called for 600 feet, but the engineer in charge was persuaded to make the height ten times the width of the base, which made the optimal height 555 feet. Getting there took a long time. The monument was built in two phases, one private, from 1848 to 1854, and one public, from 1876 to 1884. Near the top, the builders angled buttresses inward to support the 300-ton marble pyramidion that caps the monument.",History,history,https://factfusionai.com/fact/the-washington-monument-was-the-worlds-tallest-building/,"U.S. National Park Service",https://www.nps.gov/wamo/learn/historyculture/index.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
171,171,"The Washington Monument Is Made of Three Shades of Stone","Why is the Washington Monument two colors?","The Washington Monument's stone came from three quarries and never matched exactly; the slightly different colors are still distinguishable today.","Because construction stopped for years. The National Park Service says the stone came from three quarries, and the three slightly different colors are still visible.","Look closely at the Washington Monument and you can see that it is not one even color. The U.S. National Park Service explains why. Construction began as a private effort in 1848. By 1854 the monument had reached 156 feet above ground, but the society building it had always struggled to raise money, and a change in its leadership drove it to bankruptcy that year. Congress's attempts to help failed as attention turned to the crisis between the states and then the Civil War. Work did not resume until 1876, now as a public project. When it did, problems quickly emerged with the quality and color of the stone, and with irregular deliveries. The Park Service states that the stone never matched exactly, and that the three slightly different colors from the three quarries are distinguishable today.",History,history,https://factfusionai.com/fact/the-washington-monument-is-made-of-three-shades-of-stone/,"U.S. National Park Service",https://www.nps.gov/wamo/learn/historyculture/index.htm,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
172,172,"Amelia Earhart Was the First Woman to Fly the Atlantic Solo","Who was the first woman to fly solo across the Atlantic?","On May 20-21, 1932, Amelia Earhart became the first woman, and the second person after Charles Lindbergh, to fly nonstop and solo across the Atlantic Ocean.","Amelia Earhart, on May 20-21, 1932. The Smithsonian says she was the first woman, and the second person after Lindbergh, to fly the Atlantic nonstop and alone.","Five years after Charles Lindbergh flew alone from New York to Paris, Amelia Earhart matched him. The Smithsonian National Air and Space Museum, which holds her airplane, states that on May 20-21, 1932, Earhart became the first woman, and the second person after Lindbergh, to fly nonstop and solo across the Atlantic Ocean. She took off from Harbor Grace, Newfoundland, Canada, and landed about 15 hours and 2,026 miles later in a field near Londonderry, Northern Ireland. The airplane was a bright red Lockheed Vega 5B that Earhart had bought in 1930 and called her Little Red Bus. After an accident that year, its fuselage had been replaced and strengthened to carry extra fuel tanks. The same Vega is now in the museum's collection, and the museum says Earhart set two of her many aviation records in it.",History,history,https://factfusionai.com/fact/amelia-earhart-was-the-first-woman-to-fly-the-atlantic-solo/,"Smithsonian National Air and Space Museum",https://airandspace.si.edu/collection-objects/lockheed-vega-5b-amelia-earhart/nasm_A19670093000,B,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
173,173,"Earhart Made the First Solo U.S. Crossing by a Woman","Who was the first woman to fly solo across the U.S.?","On August 24-25, 1932, Amelia Earhart made the first solo, nonstop flight by a woman across the United States, from Los Angeles to Newark, New Jersey.","Amelia Earhart, on August 24-25, 1932. The Smithsonian says she flew alone and nonstop from Los Angeles to Newark in about 19 hours.","Amelia Earhart's Atlantic flight in May 1932 is the one people remember, but she set another record in the same airplane only months later. The Smithsonian National Air and Space Museum states that on August 24-25, 1932, Earhart made the first solo, nonstop flight by a woman across the United States, from Los Angeles to Newark, New Jersey. The flight covered 2,447 miles and lasted 19 hours and 5 minutes, setting women's records for both time and distance. She flew her red Lockheed Vega 5B, the same aircraft that had carried her across the Atlantic. The museum describes the Vega as sturdy, roomy, streamlined and fast, an airplane favored by pilots seeking speed and distance records. Earhart sold this one in 1933, after buying a newer Vega, and it is now in the museum's collection.",History,history,https://factfusionai.com/fact/earhart-made-the-first-solo-u-s-crossing-by-a-woman/,"Smithsonian National Air and Space Museum",https://airandspace.si.edu/collection-objects/lockheed-vega-5b-amelia-earhart/nasm_A19670093000,B,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
174,174,"The Human Genome Project Finished Two Years Early","Did the Human Genome Project finish early?","The Human Genome Project, carried out from 1990 to 2003, exceeded its initial goals by 2003, two years ahead of its projected 2005 completion.","Yes. The U.S. National Human Genome Research Institute says it met and exceeded its goals in 2003, two years ahead of its projected 2005 finish.","Big science projects usually run late. The Human Genome Project did not. The U.S. National Human Genome Research Institute describes the project, carried out from 1990 to 2003, as one of the most ambitious and important scientific endeavors in human history. Its goal was to read the human genome, determining the exact order of the bases in DNA, the As, Cs, Gs and Ts. According to the institute, partly because of a deliberate focus on developing technology, the project ultimately exceeded its initial goals, doing so by 2003, two years ahead of its originally projected 2005 completion. The sequence produced in 2003 accounted for over 90 percent of the human genome. In the United States the work was funded by the Department of Energy and the National Institutes of Health, and the projected cost was 3 billion dollars over 15 years.",Science,science,https://factfusionai.com/fact/the-human-genome-project-finished-two-years-early/,"U.S. National Institutes of Health",https://www.genome.gov/about-genomics/educational-resources/fact-sheets/human-genome-project,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
175,175,"The Northern Lights Are Caused by the Solar Wind","What causes the northern lights?","Auroras form when charged particles from the solar wind, trapped in Earth's magnetic field, collide with air molecules above the magnetic poles and make them glow.","The solar wind. NASA says charged particles from the Sun become trapped in Earth's magnetic field and collide with air molecules over the poles, which then glow.","The northern and southern lights begin on the Sun. NASA explains that the Sun continuously ejects a stream of charged particles called the solar wind. Earth has a magnetic field, which comes from the planet's rapid rotation and its molten nickel-iron core, and the solar wind distorts that field into a teardrop shape in space. When charged particles from the solar wind become trapped in the magnetic field, they collide with air molecules above our planet's magnetic poles. Those air molecules then begin to glow, and that glow is the aurora. The same magnetic field is what makes compass needles point north. It is not permanent. NASA notes that the field can flip direction, which the geologic record shows happens about every 300,000 years on average, though very irregularly.",Science,science,https://factfusionai.com/fact/the-northern-lights-are-caused-by-the-solar-wind/,NASA,https://science.nasa.gov/earth/facts/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
176,176,"Lightning to Thunder: Every 5 Seconds Is About a Mile","How do you tell how far away lightning is?","Because the sound of thunder takes about 5 seconds to travel a mile, counting the seconds between a lightning flash and its thunder and dividing by 5 gives the distance in miles.","Count the seconds and divide by 5. The U.S. National Weather Service says thunder takes about 5 seconds to travel a mile, so 15 seconds means about 3 miles.","You see lightning almost instantly, but its thunder takes time to arrive. The U.S. National Weather Service explains how to use that delay. Since it takes the sound of thunder about 5 seconds to travel a mile, you can count the number of seconds between the flash of lightning and the sound of thunder, then divide by 5, and you will get the distance to the lightning in miles. Five seconds means one mile, 15 seconds means three miles, and no gap at all means very close. The thunder itself comes from heat. The lightning discharge heats the air rapidly, to as much as 50,000 degrees Fahrenheit, and makes it expand. That sudden expansion creates the sound wave we hear. The Weather Service adds a warning: thunder means you are within striking distance and should get to a safe place immediately.",Science,science,https://factfusionai.com/fact/lightning-to-thunder-every-5-seconds-is-about-a-mile/,"National Weather Service",https://www.weather.gov/safety/lightning-science-thunder,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
177,177,"Earth's Magnetic Field Flips About Every 300,000 Years","How often does Earth's magnetic field flip?","Earth's magnetic polarity can reverse; the geologic record shows a magnetic reversal about every 300,000 years on average, though the timing is very irregular.","About every 300,000 years on average. NASA says the timing is very irregular, and that a reversal is very unlikely for at least another thousand years.","North on a compass has not always pointed the same way. NASA explains that Earth's magnetic field comes from the planet's rapid rotation and its molten nickel-iron core, and that the magnetic polarity of Earth can change, flipping the direction of the field. The geologic record tells scientists that a magnetic reversal takes place about every 300,000 years on average. The average hides a lot of variation, and NASA stresses that the timing is very irregular. There is no reason for alarm. As far as we know, NASA says, such a reversal does not cause any harm to life on Earth, and one is very unlikely to happen for at least another thousand years. The magnetic field does useful work in the meantime. It traps charged particles from the Sun, which collide with the air over the poles and create the northern and southern lights.",Science,science,https://factfusionai.com/fact/earths-magnetic-field-flips-about-every-300000-years/,NASA,https://science.nasa.gov/earth/facts/,A,85,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
178,178,"More Than 1 in 5 U.S. Adults Lives With a Mental Illness","How many U.S. adults live with a mental illness?","An estimated 59.3 million U.S. adults, 23.1 percent of the adult population, lived with a mental illness in 2022.","More than one in five. The U.S. National Institute of Mental Health estimates 59.3 million U.S. adults, or 23.1 percent, lived with a mental illness in 2022.","Mental illness is far more common than many people assume. The U.S. National Institute of Mental Health states that mental illnesses are common in the United States and around the world, and estimates that more than one in five U.S. adults live with a mental illness. In 2022 that meant 59.3 million adults aged 18 or older, or 23.1 percent of all U.S. adults. The figure covers a wide range. The institute explains that mental illnesses include many different conditions that vary in severity from mild to moderate to severe. It uses two broad categories. Any mental illness covers all recognized mental, behavioral or emotional disorders, whatever their impact. Serious mental illness is the smaller group whose disorder substantially interferes with or limits one or more major life activities. The estimates come from a national survey and count conditions present within the past year.",Psychology,psychology,https://factfusionai.com/fact/more-than-1-in-5-u-s-adults-lives-with-a-mental-illness/,"U.S. National Institute of Mental Health",https://www.nimh.nih.gov/health/statistics/mental-illness,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
179,179,"Newborn Babies Sleep 16 to 18 Hours a Day","How many hours a day do newborns sleep?","Babies initially sleep as much as 16 to 18 hours per day, which may boost growth and development, especially of the brain.","16 to 18 hours a day at first. The U.S. National Institutes of Health says that much sleep may boost a baby's growth and development, especially of the brain.","New parents often feel they never sleep. Their babies sleep a great deal. The U.S. National Institute of Neurological Disorders and Stroke states that babies initially sleep as much as 16 to 18 hours per day, which may boost growth and development, especially of the brain. The word may is the institute's own, and the reason is part of a wider mystery: everyone needs sleep, but its biological purpose remains unclear. What is clear is that the need changes with age. According to the institute, school-age children and teens on average need about 9.5 hours of sleep per night, and most adults need 7 to 9 hours. Sleep is not idle time at any age. The brain and body stay remarkably active during sleep, which affects almost every type of tissue and system in the body, from the brain and heart to mood and disease resistance.",Psychology,psychology,https://factfusionai.com/fact/newborn-babies-sleep-16-to-18-hours-a-day/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
180,180,"School-Age Children and Teens Need About 9.5 Hours of Sleep","How much sleep do teenagers need?","School-age children and teens need, on average, about 9.5 hours of sleep per night.","About 9.5 hours a night. The U.S. National Institutes of Health gives that as the average need for school-age children and teens.","How much sleep does a teenager need? More than most get, according to the numbers. The U.S. National Institute of Neurological Disorders and Stroke states that school-age children and teens on average need about 9.5 hours of sleep per night. That is more than the 7 to 9 hours most adults need, and less than the 16 to 18 hours a day that newborn babies sleep. The institute explains why it matters. Quality sleep, and getting enough of it at the right times, is as essential to survival as food and water. Sleep is important to how nerve cells communicate with each other, and without enough of it, it becomes harder to concentrate and respond quickly. Over time, a chronic lack of sleep raises the risk of health problems including high blood pressure, diabetes, depression and obesity.",Psychology,psychology,https://factfusionai.com/fact/school-age-children-and-teens-need-about-9-5-hours-of-sleep/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
181,181,"Most Adults Need 7 to 9 Hours of Sleep, Even Older People","How much sleep do adults need?","Most adults need 7 to 9 hours of sleep a night, and that remains true for older people.","Seven to nine hours a night. The U.S. National Institutes of Health says that is what most adults need, and adds that the need holds for older people too.","It is often said that people need less sleep as they get older. The U.S. National Institute of Neurological Disorders and Stroke says otherwise: most adults need 7 to 9 hours of sleep a night, even older people. The numbers change earlier in life. Babies initially sleep as much as 16 to 18 hours a day, and school-age children and teens need about 9.5 hours a night on average. Getting enough has real effects. The institute calls quality sleep as essential to survival as food and water. Lack of sleep makes it harder to concentrate and respond quickly, and research shows that a chronic lack of sleep, or poor quality sleep, increases the risk of high blood pressure, cardiovascular disease, diabetes, depression and obesity. Sleep also affects metabolism, immune function and mood.",Psychology,psychology,https://factfusionai.com/fact/most-adults-need-7-to-9-hours-of-sleep-even-older-people/,"National Institutes of Health (NINDS)",https://www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-understanding-sleep,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
182,182,"Food Poisoning Sickens About 48 Million Americans a Year","How many Americans get food poisoning each year?","The U.S. Centers for Disease Control and Prevention estimates that 48 million people get sick from a foodborne illness every year; 128,000 are hospitalized and 3,000 die.","About 48 million a year. The U.S. Centers for Disease Control and Prevention estimates that 128,000 of them are hospitalized and 3,000 die.","Food poisoning is not a rare event. The U.S. Centers for Disease Control and Prevention estimates that 48 million people get sick from a foodborne illness every year. Most recover, but not all. Of those 48 million, the CDC estimates that 128,000 are hospitalized and 3,000 die each year. These figures are estimates, and the CDC presents them as estimates, not as a count of reported cases. Put another way, the numbers describe a risk that touches a large share of the country in a single year. Hospital stays and deaths are a small fraction of the total, but in absolute terms they are not small: 128,000 hospital admissions and 3,000 deaths each year are attributed to something people ate or drank. The CDC page that gives these numbers is a short summary of the agency's national estimates of foodborne illness in the United States.",Food,food,https://factfusionai.com/fact/food-poisoning-sickens-about-48-million-americans-a-year/,"U.S. Centers for Disease Control and Prevention",https://www.cdc.gov/food-safety/data-research/facts-stats/index.html,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
183,183,"Sesame Became the Ninth Major Food Allergen in the U.S.","What is the ninth major food allergen?","Under the FASTER Act of 2021, sesame became the ninth major food allergen recognized by the United States, effective January 1, 2023.","Sesame. The FDA says the FASTER Act made it the ninth major food allergen in the United States, with the change taking effect on January 1, 2023.","For years, U.S. law named eight major food allergens: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat and soybeans. The U.S. Food and Drug Administration explains that the list grew in 2021. On April 23, 2021, the Food Allergy Safety, Treatment, Education, and Research Act, known as the FASTER Act, was signed into law, declaring sesame the ninth major food allergen recognized by the United States. The change took effect on January 1, 2023. From that date, according to the FDA, all requirements that apply to major food allergens, including labeling and manufacturing rules, apply to sesame as well. There was a transition. Products already in stores before that date did not have to be removed or relabeled, so the FDA warned that some products might not carry sesame labeling right away.",Food,food,https://factfusionai.com/fact/sesame-became-the-ninth-major-food-allergen-in-the-u-s/,"U.S. Food and Drug Administration",https://www.fda.gov/food/nutrition-food-labeling-and-critical-foods/food-allergies,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
184,184,"About 400 mg of Caffeine a Day Is Fine for Most Adults","How much caffeine a day is safe for adults?","For most adults, the FDA has cited 400 milligrams of caffeine a day, about two to three 12-fluid-ounce cups of coffee, as an amount not generally associated with negative effects.","About 400 milligrams. The FDA cites that much a day, roughly two to three 12-ounce cups of coffee, as not generally associated with negative effects for most adults.","Coffee drinkers often wonder how much is too much. The U.S. Food and Drug Administration gives a figure. For most adults, the FDA has cited 400 milligrams a day, about two to three 12-fluid-ounce cups of coffee, as an amount not generally associated with negative effects. People differ, though, and the FDA notes that it is important to know whether a product has caffeine, especially if you are sensitive to it or are giving it to children or teens. Decaf is not zero. Decaf coffee typically has 2 to 15 milligrams in an 8-fluid-ounce cup. Younger people get different advice. Medical experts advise against energy drinks for children and teens, and the Dietary Guidelines for Americans say drinks containing caffeine should be avoided for children younger than 2. In children and teens, the FDA notes, too much caffeine can cause an increased heart rate, anxiety and sleep problems.",Food,food,https://factfusionai.com/fact/about-400-mg-of-caffeine-a-day-is-fine-for-most-adults/,"U.S. Food and Drug Administration",https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
185,185,"Energy Drinks Can Hold Up to 328 mg of Caffeine per Can","How much caffeine is in an energy drink?","Energy drinks generally contain 54 to 328 milligrams of caffeine per 16 fluid ounces, according to the FDA.","54 to 328 milligrams per 16 fluid ounces, according to the FDA. A few brands contain 41 to 246 milligrams per 12 fluid ounces.","The words energy drink tell you little about how much caffeine is inside. The U.S. Food and Drug Administration states that energy drinks generally have 54 to 328 milligrams of caffeine per 16 fluid ounces, with a few brands containing 41 to 246 milligrams per 12 fluid ounces. The top of that range is close to the 400 milligrams a day that the FDA cites as an amount not generally associated with negative effects for most adults. The name itself, the FDA notes, was developed by the food industry to describe certain beverages, and the agency has no regulation specific to energy drinks. General rules on the safe use of ingredients still apply. Most energy drinks sold in the United States list the total caffeine from all sources on the label, including ingredients such as guarana that also contain caffeine.",Food,food,https://factfusionai.com/fact/energy-drinks-can-hold-up-to-328-mg-of-caffeine-per-can/,"U.S. Food and Drug Administration",https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
186,186,"Sushi Has Been Wrapped in Seaweed for at Least 1,500 Years","How long has sushi been wrapped in seaweed?","For at least 1,500 years, the Japanese have wrapped raw fish, sticky rice and other ingredients in a seaweed called nori.","At least 1,500 years. NOAA says the Japanese have wrapped raw fish and sticky rice in the seaweed nori for at least that long.","Seaweed is an old food. NOAA's National Ocean Service states that for at least 1,500 years, the Japanese have enrobed a mixture of raw fish, sticky rice and other ingredients in a seaweed called nori. NOAA describes seaweed as chock-full of vitamins, minerals and fiber, and adds that it can be tasty. The name is a little unfair. NOAA calls the word seaweed a bona fide misnomer, because a weed is a plant that spreads so profusely it can harm the habitat where it takes hold. Seaweed is the common name for countless species of marine plants and algae. Its uses go well beyond the dinner table. According to NOAA, seaweeds are effective binding agents in commercial goods such as toothpaste and fruit jelly, and popular softeners in organic cosmetics and skin-care products.",Food,food,https://factfusionai.com/fact/sushi-has-been-wrapped-in-seaweed-for-at-least-1500-years/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/seaweed.html,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
187,187,"One Day on Mercury Lasts Two Mercury Years","How long is a day on Mercury?","One solar day on Mercury, a full day-night cycle, equals 176 Earth days, just over two years on Mercury.","176 Earth days. NASA says one full day-night cycle on Mercury lasts that long, which is just over two Mercury years.","Mercury races around the Sun but turns slowly on its axis, and the combination produces a very strange calendar. NASA states that Mercury completes one rotation every 59 Earth days. Because it is also moving quickly along its orbit, one Mercury solar day, meaning one full day-night cycle, equals 176 Earth days. That is just over two years on Mercury, since the planet circles the Sun every 88 Earth days. A long day means long heat and long cold. NASA says daytime temperatures on Mercury can reach 800 degrees Fahrenheit, or 430 degrees Celsius, while nights, with no atmosphere to hold the heat, can drop to minus 290 degrees Fahrenheit. Mercury may even have water ice. NASA says it could survive at the poles, inside deep craters that stay in permanent shadow.",Space,space,https://factfusionai.com/fact/one-day-on-mercury-lasts-two-mercury-years/,"Caltech IPAC (Cool Cosmos) | NASA","https://coolcosmos.ipac.caltech.edu/ask/23-How-long-is-a-day-on-Mercury | https://science.nasa.gov/mercury/facts/","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
188,188,"Pluto's Moon Charon Is So Big It Makes Pluto Wobble","Why does Pluto wobble?","Pluto has five moons, including Charon, a moon so large that it makes Pluto wobble.","Charon. NASA says Pluto has five moons, and Charon is so large that it makes Pluto wobble.","Moons usually circle their planets without moving them much. Pluto's largest moon is an exception. NASA states that Pluto, which is smaller than our own Moon, has five moons in its orbit, including Charon, a moon so large it makes Pluto wobble. Pluto lives in a crowded neighborhood at the edge of the solar system. NASA describes it as the best-known member of the Kuiper Belt, a ring of icy bodies almost all smaller than Pluto. Moons are common across the solar system. NASA counts hundreds of moons orbiting planets, dwarf planets and even asteroids, with the giant planets Jupiter and Saturn leading the counts. Two planets go without. Mercury and Venus are the only planets that have no moons at all, although Venus has a quasi-satellite that has officially been named Zoozve.",Space,space,https://factfusionai.com/fact/plutos-moon-charon-is-so-big-it-makes-pluto-wobble/,"NASA | NASA Photojournal (New Horizons)","https://science.nasa.gov/solar-system/solar-system-facts/ | https://science.nasa.gov/photojournal/a-moon-over-pluto-animation/","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
189,189,"Mercury and Venus Are the Only Planets Without Moons","Which planets have no moons?","Of the eight planets, Mercury and Venus are the only ones with no moons, although Venus has a quasi-satellite named Zoozve.","Mercury and Venus. NASA says they are the only planets with no moons, though Venus does have a quasi-satellite officially named Zoozve.","Most planets in our solar system have company. NASA states that of the eight planets, Mercury and Venus are the only ones with no moons. There is a small asterisk. Venus does have a quasi-satellite, which has officially been named Zoozve. It is not counted as a moon. Elsewhere, moons are plentiful. NASA says the solar system has hundreds of moons orbiting planets, dwarf planets and asteroids, and that the giant planets Jupiter and Saturn lead the counts, with swarms of moons that resemble miniature solar systems. Earth sits at the modest end, as the only planet in the solar system with exactly one moon. Even little Pluto, which is smaller than our Moon, has five moons of its own, one of them large enough to make Pluto wobble.",Space,space,https://factfusionai.com/fact/mercury-and-venus-are-the-only-planets-without-moons/,"NASA | NASA (Venus facts)","https://science.nasa.gov/solar-system/solar-system-facts/ | https://science.nasa.gov/venus/facts/","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
190,190,"A Comet's Tail Can Stretch for Millions of Miles","How long is a comet's tail?","When a comet nears the Sun, it heats up and releases dust and gases that form a tail stretching away from the Sun for millions of miles.","Millions of miles. NASA says a comet near the Sun spews dust and gases into a glowing head and a tail that stretches away from the Sun for millions of miles.","A comet is small, but its display is not. NASA describes comets as cosmic snowballs of frozen gases, rock and dust that orbit the Sun. When a comet's orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases then form a tail that stretches away from the Sun for millions of miles. Note the direction: NASA says the tail stretches away from the Sun. There are a great many of them. According to NASA, there are likely billions of comets orbiting our Sun in the Kuiper Belt and in the even more distant Oort Cloud. NASA counts them among the small bodies of the solar system, along with asteroids and meteors.",Space,space,https://factfusionai.com/fact/a-comets-tail-can-stretch-for-millions-of-miles/,"ESA | NASA","https://esa.int/ESA_Multimedia/Images/2023/11/Structure_of_a_comet | https://science.nasa.gov/solar-system/comets/","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
191,191,"The Sun's Core Is About 27 Million Degrees Fahrenheit","How hot is the core of the Sun?","The temperature in the Sun's core is about 27 million degrees Fahrenheit (15 million degrees Celsius), hot enough to sustain nuclear fusion.","About 27 million degrees Fahrenheit (15 million Celsius). NASA says that is hot enough to sustain nuclear fusion.","The Sun is hottest at its center. NASA states that the temperature in the Sun's core is about 27 million degrees Fahrenheit, or 15 million degrees Celsius, which is hot enough to sustain nuclear fusion. Fusion there creates outward pressure that supports the star's gigantic mass and keeps it from collapsing. The core is enormous in its own right, about 86,000 miles, or 138,000 kilometers, thick. Temperatures change sharply as you move outward. The part of the Sun we call its surface, the photosphere, is a relatively cool 10,000 degrees Fahrenheit. Then, oddly, it gets hotter again. NASA says the corona, the Sun's expansive outer atmosphere, reaches up to 3.5 million degrees Fahrenheit, much hotter than the photosphere below it. For all that, NASA calls the Sun only an average star in terms of size.",Space,space,https://factfusionai.com/fact/the-suns-core-is-about-27-million-degrees-fahrenheit/,"ESA | NASA","https://www.esa.int/spaceinimages/ESA_Multimedia/Images/2019/10/Anatomy_of_our_Sun | https://science.nasa.gov/sun/facts/","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
192,192,"Energy Takes About 170,000 Years to Travel Out From the Sun's Core","How long does energy take to travel out from the Sun's core?","Energy made in the Sun's core takes about 170,000 years to get from the core to the top of the convection zone.","NASA says energy made by fusion in the Sun's core takes about 170,000 years to get from the core to the top of the convection zone. The European Space Agency gives the same figure for light crossing the radiative zone.","In the Sun's core, nuclear fusion turns hydrogen into helium and releases energy. That energy does not fly straight out. It first has to cross the radiative zone, a thick layer around the core where light is absorbed and given off again countless times, so it moves outward very slowly. The European Space Agency says photons take around 170,000 years to pass through the radiative zone. NASA gives about 170,000 years for energy to get from the core to the top of the convection zone, the outer layer where hot gas rises and sinks like boiling water. Once the energy reaches the surface, the last step is quick: sunlight crosses the 93 million miles to Earth in a little over eight minutes. Neither agency explains how the figure was calculated, so we quote it as they give it.",Space,space,https://factfusionai.com/fact/energy-from-the-suns-core-takes-170000-years-to-escape/,"ESA | NASA","https://www.esa.int/spaceinimages/ESA_Multimedia/Images/2019/10/Anatomy_of_our_Sun | https://science.nasa.gov/sun/facts/","A | A",90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
193,193,"The Milky Way Is More Than 100,000 Light-Years Across","How big is the Milky Way galaxy?","The Milky Way is a spiral galaxy with a disk of stars spanning more than 100,000 light-years.","More than 100,000 light-years. NASA says our galaxy is a spiral with a disk of stars at least that wide, and that Earth sits about halfway from the center.","Our home galaxy is so large that its size is measured in the distance light travels in a year. NASA states that the Milky Way is a spiral galaxy with a disk of stars spanning more than 100,000 light-years. We live inside that disk. Earth is located along one of the galaxy's spiral arms, about halfway from the center. From that vantage point, NASA explains, the Milky Way looks like a faint, milky band of light arcing across the entire sky, which is how it got its name. It is one galaxy among many. The Milky Way sits in a neighborhood of over 50 other galaxies called the Local Group, whose members range from dwarf galaxies with up to a few billion stars to Andromeda, our nearest large neighbor. The largest galaxies of all, NASA says, contain trillions of stars.",Space,space,https://factfusionai.com/fact/the-milky-way-is-more-than-100000-light-years-across/,"ESA | NASA","https://sci.esa.int/web/gaia/-/58282-gaia-s-first-sky-map | https://science.nasa.gov/universe/galaxies/","A | A",95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-13,yes
194,194,"A Dead Whale Can Feed Deep-Sea Life for Decades","What is a whale fall?","When a whale dies and sinks, its carcass, called a whale fall, can support rich communities of deep-sea life for years to decades.","Years to decades. NOAA says a sunken whale carcass, called a whale fall, feeds a succession of deep-sea communities for that long.","In the deep sea, food is scarce, so a dead whale is a feast. NOAA's National Ocean Service explains that when whales die and sink, their carcasses, known as whale falls, provide a sudden, concentrated food source for organisms in the deep sea. Different stages in the decomposition of the carcass support a succession of different marine communities. The skeleton lasts longest. NOAA states that the whale skeleton can support rich communities for years to decades, both as a hard surface for animals to settle on and as a source of sulfides released as the bones decay. Microbes live off the energy from those chemical reactions and form the basis of ecosystems for as long as the food lasts. Researchers do find them. In 2019 an expedition discovered a whale fall 10,623 feet below the surface in Monterey Bay National Marine Sanctuary.",Weird,weird,https://factfusionai.com/fact/a-dead-whale-can-feed-deep-sea-life-for-decades/,"NOAA National Ocean Service",https://oceanservice.noaa.gov/facts/whale-fall.html,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
195,195,"On Venus, the Sun Rises in the West","Does the Sun rise in the west on Venus?","On Venus the Sun would rise in the west and set in the east, because Venus spins backward compared to Earth.","In the west. NASA says the Sun would rise in the west and set in the east on Venus, because Venus spins backward compared to Earth.","Almost everything about sunrise on Venus is strange. NASA points out that, because of the planet's extremely slow rotation, sunrise to sunset on Venus would take 117 Earth days. The direction is backward as well. In NASA's words, the Sun would rise in the west and set in the east, because Venus spins backward compared to Earth. Nobody would be watching it in comfort. NASA describes Venus as the hottest planet in our solar system, with a thick atmosphere that traps heat in a runaway greenhouse effect and surface temperatures of about 872 degrees Fahrenheit, hot enough to melt lead. The atmosphere is mostly carbon dioxide, with dense clouds of sulfuric acid that would hide the Sun anyway. Despite all of this, NASA notes that Venus is sometimes called Earth's twin.",Weird,weird,https://factfusionai.com/fact/on-venus-the-sun-rises-in-the-west/,NASA,https://science.nasa.gov/venus/venus-facts/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
196,196,"More Than 150 Asteroids Have Their Own Moons","Do asteroids have moons?","More than 150 asteroids are known to have small companion moons.","More than 150. NASA says that many asteroids are known to have small companion moons.","Moons are not only for planets. NASA states that more than 150 asteroids are known to have small companion moons. Most asteroids orbit the Sun between Mars and Jupiter, in the main asteroid belt. They range enormously in size, from Vesta, the largest at about 329 miles across, to small asteroids less than 33 feet across. Together they add up to surprisingly little, since NASA says the total mass of all the asteroids combined is less than that of Earth's Moon. Asteroid moons are more than a curiosity. In 2022, NASA's DART mission deliberately crashed into Dimorphos, a small moonlet orbiting a larger asteroid, and successfully altered its orbit and physical shape.",Weird,weird,https://factfusionai.com/fact/more-than-150-asteroids-have-their-own-moons/,NASA,https://science.nasa.gov/solar-system/asteroids/facts/,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
197,197,"Mars's Moon Phobos Will Crash Into Mars or Break Apart","Will Phobos crash into Mars?","Phobos, the larger of Mars's two moons, is slowly moving toward Mars and will crash into the planet or break apart in about 50 million years.","In about 50 million years. NASA says Phobos is slowly moving toward Mars and will crash into it or break apart, possibly leaving a dusty ring.","Mars has two small moons, Phobos and Deimos, which NASA says may be captured asteroids. Phobos, the innermost and larger of the two, is heavily cratered and has deep grooves on its surface. It also has a limited future. NASA states that Phobos is slowly moving towards Mars and will crash into the planet or break apart in about 50 million years. Mars might gain something in the process. According to NASA, if Phobos breaks apart, it could create a dusty ring around the Red Planet. The other moon is quieter. Deimos is about half as big as Phobos and orbits two and a half times farther from Mars. Its craters are often filled with loose dirt, which makes it look smoother than pockmarked Phobos. NASA also notes that Phobos is the innermost of the two moons, circling closer to Mars than Deimos does.",Weird,weird,https://factfusionai.com/fact/marss-moon-phobos-will-crash-into-mars-or-break-apart/,NASA,https://science.nasa.gov/mars/facts/,A,90,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
198,198,"Yellowstone's Rainbow Colors Come From Heat-Loving Microbes","Why are Yellowstone's hot springs so colorful?","Many of the bright colors in Yellowstone's hydrothermal basins come from thermophiles, microorganisms that thrive in hot temperatures.","From microbes. The National Park Service says many of the bright colors come from thermophiles, heat-loving microorganisms grouped in their trillions.","The vivid oranges, yellows and greens around Yellowstone's hot springs are alive. The U.S. National Park Service explains that many of the bright colors found in the park's hydrothermal basins come from thermophiles, microorganisms that thrive in hot temperatures. The name means heat lover. Individually they are too small to see, but so many are grouped together, trillions of them, that they appear as mats of color. Each kind has a narrow range. Different types of thermophiles live at specific temperatures within a hot spring and cannot tolerate much cooler or warmer conditions, so the colors change in bands where one group reaches its limit and another takes over. They live in conditions extreme to human life, from near-boiling water to acidity that can burn holes in clothing. Not every color is biological: the intense blue of some springs comes from sunlight in deep, clear water.",Nature,nature,https://factfusionai.com/fact/yellowstones-rainbow-colors-come-from-heat-loving-microbes/,"U.S. National Park Service",https://www.nps.gov/yell/learn/nature/hydrothermal-features.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
199,199,"A Saguaro Can Weigh 80 Pounds for Every Foot of Its Trunk","How much does a saguaro cactus weigh?","Because most of a saguaro cactus is water, a large plant may weigh 80 pounds for each foot of its main trunk.","About 80 pounds per foot of trunk. The National Park Service says that is possible because most of a saguaro is water.","A saguaro is a water tank with spines. The U.S. National Park Service explains that because the majority of a saguaro is made up of water, a large plant may weigh 80 pounds for each foot of its main trunk. Storing that water takes clever engineering. During a heavy rain, a saguaro absorbs as much water as its roots allow, and the pleats on its surface expand like an accordion to make room. When the desert is dry, the plant uses its stored water and the pleats contract. The roots help, growing out from the plant in all directions only a few inches below the ground. All that weight is held up by a circular skeleton of interconnected woody ribs, one for each pleat on the outside. People have used those ribs too, as framework for building walls and as poles for picking saguaro fruit.",Nature,nature,https://factfusionai.com/fact/a-saguaro-can-weigh-80-pounds-for-every-foot-of-its-trunk/,"U.S. National Park Service",https://www.nps.gov/sagu/learn/nature/saguaro.htm,A,95,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
200,200,"An Aspen Grove in Utah May Be 16,000 Years Old","How old is the oldest aspen grove in Utah?","A quaking aspen grove known as Pando, in the Wasatch Mountains of Utah, is estimated to be around 16,000 years old.","About 16,000 years, by one estimate. The National Park Service says a quaking aspen grove in Utah known as Pando is estimated to be that old.","The oldest living things are not always single trees. The U.S. National Park Service, writing about the ancient bristlecone pines of Great Basin National Park, points out that bristlecones may be the longest-living non-clonal organisms, but clonal organisms are considered to be much older. A clonal organism is a group of genetically identical plants, fungi or bacteria that clone themselves without sexual reproduction, so many stems can be one living thing. The Park Service gives an example. A quaking aspen grove known as Pando, in the Wasatch Mountains of Utah, is estimated to be around 16,000 years old. The word estimated is the Park Service's own, and we keep it. The Park Service also names the Mojave Desert creosote as another clonal organism considered to be much older than any bristlecone.",Nature,nature,https://factfusionai.com/fact/an-aspen-grove-in-utah-may-be-16000-years-old/,"U.S. National Park Service",https://www.nps.gov/grba/planyourvisit/identifying-bristlecone-pines.htm,A,80,2026-10-03,"Ali Ahmad Chaudhry",2026-10-03,2026-10-03,yes
1738,1738,"Most Diverse Animal Group","What is the most diverse group of animals on Earth?","Insects are the most diverse group of animals on Earth, with more than one million described species—representing more than half of all known animal species.","Insects are the most diverse group of animals on Earth, with more than one million described species representing over half of all known animal species.","Insects represent an astonishing variety of life on our planet, boasting more than one million described species. This massive group makes up more than half of all known animal species currently documented by science. For the ordinary reader, this staggering diversity highlights just how dominant these small creatures are within global ecosystems. Understanding that insects comprise the majority of known animals can be quite surprising given their typically small sizes compared to mammals, birds, and reptiles. Their sheer abundance means they play critical roles in natural environments worldwide. This immense variety underscores the complexity of our natural world and the vast scale of biodiversity that scientists continue to study and document today.",Animal,animal,https://factfusionai.com/fact/most-diverse-animal-group/,"Wikipedia: Insect",https://en.wikipedia.org/wiki/Insect,B,90,2026-10-14,"Ali Ahmad Chaudhry",2026-10-14,2026-10-14,yes
1739,1739,"Meganeura Monyi: The Giant Dragonfly","What was the wingspan of Meganeura monyi?","The giant dragonfly-like insect Meganeura monyi, which lived around 300 million years ago, had a wingspan of up to 75 cm (2.5 feet)—made possible by the higher oxygen levels of the late Carboniferous period.","Meganeura monyi was a giant dragonfly-like insect that lived around 300 million years ago and had a wingspan of up to 75 cm, or 2.5 feet.","The insect known as Meganeura monyi lived approximately 300 million years ago during the late Carboniferous period. This creature resembled a modern dragonfly and possessed an astonishing wingspan of up to 75 cm, which translates to 2.5 feet. Such massive size was made possible directly by the significantly higher oxygen levels present in the atmosphere during that specific geological period. For an ordinary reader, this fascinating historical fact highlights how drastically Earth's atmospheric composition has changed over millions of years and how these environmental shifts directly influenced the physical scale of ancient life forms. The existence of such enormous flying insects offers a remarkable glimpse into a prehistoric world vastly different from our own, demonstrating the profound impact of atmospheric chemistry on the evolution of biological organisms.",Animal,animal,https://factfusionai.com/fact/meganeura-monyi-the-giant-dragonfly/,"Wikipedia: Meganeura",https://en.wikipedia.org/wiki/Meganeura,B,90,2026-10-14,"Ali Ahmad Chaudhry",2026-10-14,2026-10-14,yes
1740,1740,"Insects and the Evolution of Flight","Are insects the only invertebrates that can fly?","Insects are the only invertebrates that have evolved the ability to fly, and insect flight evolved only once in evolutionary history.","Insects are the only invertebrates that have evolved the ability to fly. This incredible capability evolved only once in evolutionary history.","This fascinating fact highlights a unique milestone in the natural world. While many animals possess the power of flight today, insects stand completely alone among all invertebrates in achieving this remarkable feat. What makes this even more extraordinary is that this complex ability appeared just a single time throughout the vast expanse of evolutionary history, rather than developing multiple separate times across different groups. For an ordinary reader, this means that every single flying insect you see today shares a distant, ancient ancestor that first took to the skies. Understanding this singular evolutionary leap helps us appreciate the deep interconnectedness of insect life on Earth. It shows how one monumental biological shift can shape the diversity of an entire class of creatures, leading to the countless buzzing and soaring species that populate our ecosystems today without ever repeating the process in other invertebrate lineages.",Animal,animal,https://factfusionai.com/fact/insects-and-the-evolution-of-flight/,"Wikipedia: Insect flight",https://en.wikipedia.org/wiki/Insect_flight,B,90,2026-10-14,"Ali Ahmad Chaudhry",2026-10-14,2026-10-14,yes
1741,1741,"Male Moth Pheromone Detection","How far can male moths detect female pheromones?","Male moths can detect the pheromones of female moths over distances of more than a kilometer using their highly sensitive antennae.","Male moths can detect the pheromones of female moths over distances of more than a kilometer by using their highly sensitive antennae.","Male moths possess remarkable biological adaptations that allow them to sense chemical signals released by female moths from surprisingly vast distances. By utilizing their highly sensitive antennae, these insects are capable of picking up scent particles that are spread thinly across the open air, spanning over a kilometer away. This capability highlights the incredible specialization found in nature, where tiny organisms can achieve feats of sensory perception that far exceed human technological limits. For the ordinary reader, understanding this phenomenon offers a fascinating glimpse into the hidden sensory worlds of common insects operating all around us. It shows how the natural world relies on complex chemical communication rather than sight or sound to ensure survival and reproduction. This astonishing range of detection ensures that even when sparse populations are spread wide apart, individuals are still able to locate potential mates across significant landscapes without ever needing to see or hear them.",Animal,animal,https://factfusionai.com/fact/male-moth-pheromone-detection/,"Wikipedia: Moth",https://en.wikipedia.org/wiki/Moth,B,90,2026-10-14,"Ali Ahmad Chaudhry",2026-10-14,2026-10-14,yes
1742,1742,"The Loudest Insect: African Cicada Brevisana brevis","How loud is the African cicada Brevisana brevis?","The African cicada Brevisana brevis produces sounds measured at 106.7 decibels at a distance of 50 cm—making it one of the loudest insects in the world.","The African cicada Brevisana brevis produces sounds measured at 106.7 decibels at a distance of 50 cm, making it one of the loudest insects in the world.","The African cicada Brevisana brevis is a remarkable creature known for producing extreme sound levels. Specifically, this insect generates noise measured at 106.7 decibels when recorded from a distance of 50 cm. This extraordinary volume places it securely among the loudest insects found anywhere in the world. For an ordinary reader, encountering a decibel measurement this high coming from a small insect can be quite surprising. Decibels measure sound intensity, and a level exceeding 106 decibels is comparable to the noise produced by heavy machinery or loud power tools, yet it is generated entirely by a tiny biological organism. Understanding this remarkable capability highlights the diverse adaptations found in nature. While humans rely on technology for amplification, certain insects have evolved specialized physical mechanisms to produce acoustic signals that travel significant distances, showcasing the astonishing extremes of the natural world without requiring any additional outside elements or explanations.",Animal,animal,https://factfusionai.com/fact/the-loudest-insect-african-cicada-brevisana-brevis/,"Wikipedia: Cicada",https://en.wikipedia.org/wiki/Cicada,B,90,2026-10-14,"Ali Ahmad Chaudhry",2026-10-14,2026-10-14,yes
2408,2408,"The First Known Forensic Science Book Was Written in China in the 1240s","What was the first forensic science book?","The first written account of using medicine and entomology to solve criminal cases is attributed to the Chinese book 'Xi Yuan Lu' (Washing Away of Wrongs), written in 1248 by Song Ci, making it the world's earliest forensic science manual.","The first written account of using medicine and insects to solve crimes is attributed to Xi Yuan Lu (Washing Away of Wrongs), written by the Chinese official Song Ci in the 1240s. Wikipedia gives 1248; many histories give 1247.","Song Ci (1186 to 1249) was an official of the Song dynasty in charge of justice, prisons and the supervision of investigations. His book Xi Yuan Lu, usually translated as Washing Away of Wrongs, gathered guidance for officials who had to work out how a person had died. Its best-known case is a murder with a sickle. The investigator had the local men lay their sickles out in the sun. Flies gathered on only one of them, drawn by traces of blood too small to see, and its owner confessed. It is one of the earliest recorded uses of insects to solve a crime, the field now called forensic entomology. The book also explains how to tell a drowning from a strangling, using marks on the body. Sources differ slightly on its date: Wikipedia's article on forensic science gives 1248, while many histories of the subject give 1247.",History,history,https://factfusionai.com/fact/the-earliest-forensic-science-manual/,"Wikipedia: Forensic science",https://en.wikipedia.org/wiki/Forensic_science,B,75,2026-10-13,"Ali Ahmad Chaudhry",2026-10-13,2026-10-13,yes
2410,2410,"Alec Jeffreys Developed DNA Fingerprinting in 1984","Who invented DNA fingerprinting, and when?","Sir Alec Jeffreys invented DNA fingerprinting in 1984 at the University of Leicester by realizing that certain DNA regions have highly variable repetitive sequences unique to each individual.","Alec Jeffreys developed DNA fingerprinting, now called DNA profiling, in 1984 while working in the Department of Genetics at the University of Leicester in England.","DNA fingerprinting compares the parts of a person's DNA that differ most from one person to the next. Jeffreys noticed that some stretches of DNA are made of short sequences repeated many times over, and that the number of repeats varies between people. Comparing those patterns shows whether two samples are likely to come from the same person, or from close relatives. The method soon moved from the laboratory into court. In the Narborough murder case in Leicestershire, it was first used to clear an innocent suspect who had confessed, and then to help identify the real killer, Colin Pitchfork. Today the police, courts and disaster-victim teams around the world use DNA profiling. Modern tests look at different regions of DNA than Jeffreys did in 1984, but the idea is the same: compare the parts of DNA that vary most between people.",History,history,https://factfusionai.com/fact/invention-of-dna-fingerprinting/,"Wikipedia: DNA profiling",https://en.wikipedia.org/wiki/DNA_profiling,B,75,2026-10-13,"Ali Ahmad Chaudhry",2026-10-13,2026-10-13,yes
2411,2411,"Colin Pitchfork Was the First Killer Caught Using DNA Profiling","Who was the first murderer caught using DNA?","Colin Pitchfork became the first person convicted using DNA evidence in 1988, after being caught when a coworker revealed he had someone else submit a DNA sample on his behalf during a mass screening.","In 1988 Colin Pitchfork admitted two murders in Leicestershire, England, the first murder case solved with DNA profiling. He was caught after it came out that a coworker had given a blood sample in his place.","Two teenage girls were murdered near the villages of Narborough and Enderby in Leicestershire, one in 1983 and one in 1986. Police asked Alec Jeffreys, who had developed DNA fingerprinting at the nearby University of Leicester, to test samples from both crimes. His results showed that a young man who had confessed to the second murder could not have committed it. Police then asked around 5,000 local men to give blood samples. Pitchfork persuaded a coworker, Ian Kelly, to give a sample in his name. Kelly later talked about it, another coworker reported it, and Pitchfork was arrested. His DNA matched the samples from the crime scenes, and he pleaded guilty. The case showed for the first time that DNA could both clear an innocent suspect and identify the guilty one.",History,history,https://factfusionai.com/fact/colin-pitchfork-convicted-using-dna-evidence/,"Wikipedia: DNA profiling",https://en.wikipedia.org/wiki/DNA_profiling,B,75,2026-10-13,"Ali Ahmad Chaudhry",2026-10-13,2026-10-13,yes