If you've ever stayed up the whole night through, you may have noticed that you begin to feel cold in the hours just before morning. Why does this happen?
Have you been having trouble sleeping lately? Learn about an interesting way to cure insomnia!
Find out why melatonin is called "the hormone of darkness."
Scientists have long wondered how cetaceans, such as whales and dolphins, are able to get enough sleep. Learn more on this Moment of Science.
How is it that cats can sleep so much? Learn more on this Moment of Science.
If you've ever been up all night, you may have found that staying awake becomes a lot easier after five or six a.m. Why?
Chances are you've heard a description of what's called a near death, out-of-body experience. For a lot of people, it's a powerful, even mystical experience.
Scientists have reason to believe birds have music on the brain when they're sleeping. Researchers think that birds dream about their songs.
How much sleep are you really getting? It may be even less than you think.
America is obsessed with diets, but sometimes gaining weight is more complex than calories in versus calories burned.