We spend about a third of our lives in sleep. But why do we sleep, and how can we do it better? Sleep is critical to our cognitive performance and mental and physical health. Studies have found that ...

Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep. Sleep is universal "even though it's actually very ...

This is the third installment in a series of articles about the science of various aspects of college life. Around 70% of college students report getting less than eight hours of sleep a night. With ...