Researchers have discovered that positive emotions enhance perceptual memories during sleep, particularly in the non-REM stage.

REM sleep goes even deeper into brain recovery, dreaming and processing memories and emotions. This is the sleep stage in ...

Recent studies reveal how the timing of dreams may offer clues to Alzheimer's risk. How sleep patterns impact cognitive health and prevention.

People who make a habit of sleeping on the job comprise a secret society of sorts within the U.S. labor force. Inspired by ...

Considering how much time cats spend asleep it seems reasonable that they would have dreams. Cats sleep 15 hours a day on ...

Study says to take a nap when you hit a dead end and can't seem to solve a problem. You'll wake up with your answer.

A sleep expert details why you wake up groggy from a nap and how to make the most of your snack-sized slumber.