Sleep & Dreams Facts
Why we sleep, how we dream and what happens at night.
Night Owls Face Higher Heart Risk
Being a 'night owl' is linked to higher heart attack and stroke risk according to a major study.
How Dolphins Sleep With One Brain Hemisphere
Dolphins sleep with one hemisphere of their brain at a time for 15-20 minutes – this allows them to continue swimming, breathing, and watching for predators 24/7.