Researchers have found that non-REM sleep actually helps strengthen memories, while REM sleep cleans them up and prevents ...

Textbooks say that mitochondria exist to supply cells with energy, but experiments in fruit flies suggest they are also ...

IT IS HARD to overstate the importance of sleep. Regular hours of rest offer organisms of all sizes a chance to consolidate ...

“Human sleep architecture is still fairly different than a mouse, but we do have the same brain circuit that was studied here,” says Laura Lewis at the Massachusetts Institute of Technology.

You’re drifting off to sleep, floating in that hazy realm between wakefulness and dreams, when suddenly—BAM!—your body jerks violently as if you’ve been dropped from a height. Your heart ...

A new study has identified for the first time signatures of sleep in the honey bee brain, showing remarkable parallels with sleep in humans and other vertebrates. It combined advanced optical ...

The time change can be hard on our health. There are more car accidents, strokes and heart attacks this week. People eat more junk food and have more migraines. Here's why — plus tips to help ...

Sleep expert Matthew Walker, director of the Center for Human Sleep Science at the University of California, Berkeley and author of the excellent book Why We Sleep, says that sleep is the single ...

Humans, then, seem to have evolved to need less sleep than our primate relatives. Samson showed in a 2018 analysis that we did this by lopping off non-REM time.

The study determined that humans’ sleep efficiency was 81 percent, while dogs’ was 85 percent. The New York Times reported that anything over 80 is good.

Humans need an average of seven and a half hours of sleep per night, but some only need five hours and some need as many as ten hours, according to the National Institutes of Health.