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.

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.

Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement, or REM, sleep — may hasten the ...

Deep sleep is the restorative stage of sleep. During this stage the body undergoes tissue repair, the immune system is ...

People on TikTok and other social media say they feel more alert when they have had fewer hours of sleep—but sleep scientists warn this is a false sense of energy ...

If you're on the fence about the best sleep masks, know that there are two types of sleepers in this world: Those who can ...

New research shows that reduced time in slow wave and REM sleep is associated with smaller brain volumes in regions ...

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 ...

A new study suggests that insufficient slow-wave and REM sleep may accelerate brain deterioration associated with Alzheimer's ...

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 ...

When humans sleep, our brains cycle through stages, alternating between rapid eye movement (REM) sleep and non-REM sleep roughly every 90 minutes. Birds go through these same stages, but typically ...