Sleep disconnects the brain from the outside world. The stream of sensory information is stopped. This allows for the replay ...

Danish scientists found that a molecule called norepinephrine plays a key role in brain cleaning in mice. During deep sleep, ...

Quick fixes like meal timings, alcohol, caffeine, and exercise offer dangerously temporary solutions to the sleep problems ...

Deep sleep may clear the brain of toxic waste via a process driven by norepinephrine, a molecule that creates rhythmic blood vessel contractions.

People whose jobs are highly sedentary—an estimated 80% of the modern workforce— experience a much higher risk of insomnia ...

There are several reasons why some people may need to sleep much less than the recommended average of seven to nine hours per ...