Sleep may not just be rest for the mind—it may be essential maintenance for the body's power supply. A new study by University of Oxford researchers, published in Nature, reveals that the pressure to ...

Each night your soul departs, ascends, and returns transformed. Discover the mystery behind why God design us to be unconscious for a third of our lives. Why do we sleep? From a medical standpoint, we ...

This is Expert Habits, a regular column in which thinkers, leaders, and other high performers talk about the habits and routines that help them live a better life. Why do we sleep? Dr. Matthew Walker, ...

Ever wondered why you sometimes have conversations in your sleep? These are the three leading explanations, according to biology. Every night, your brain performs a kind of controlled disappearing act ...

As night falls, the lights go out, and after a long day, the husband and wife settle into bed. Suddenly, a small domestic "battle" begins: "Hey! That's my side, you go over there!" The other person ...

Have you ever noticed how some people bounce out of bed after just a few hours of sleep, while others can barely function without a solid eight hours? Take Margaret Thatcher, for example. The former ...

Continuous sleep is a modern habit, not an evolutionary constant, which helps explain why many of us still wake at 3am and wonder if something’s wrong. It might help to know that this is a deeply ...

Researchers led by Masako Tamaki at the RIKEN Center for Brain Science in Japan report a link between deep sleep and cerebrospinal fluid, the clear liquid that surrounds and supports the brain and ...