Hallucinogens like DMT, psilocin, and LSD might rewrite the rules of sleep, blurring the line between dreams and reality.

REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

On an Apple Watch, "core sleep" is another name for light sleep, which scientists also call stages N1-N2. It is not a type of ...

What if we didn't need sleep to dream? Well, scientists may have found a way to hack those benefits even when you're awake.

A new study reveals that not getting enough of specific stages in the sleep cycle may be linked to cognitive decline and ...

Research reveals how specific sleep stages protect brain vulnerable to Alzheimer's, offering hope through simple lifestyle ...

Disrupted SWS (critical for waste clearance) and REM sleep (key for memory) may impair the glymphatic system, hindering the ...

Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement, or REM, sleep — may hasten the deterioration of parts of the brain associated with Alzheimer’s ...

A study suggests less time in REM and slow wave sleep may correlate with brain changes linked to Alzheimer's. Researchers ...