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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.

Among the various sleep stages, two of the most well-known are REM sleep and deep sleep. REM sleep is closely associated with cognition and emotions (not to mention vivid dreams). Meanwhile ...

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

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 ...

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 ...

Sleep deficiency is associated with atrophy of the inferior parietal region of the brain, according to a study published online March 31 in the Journal of Clini ...

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 ...

They also measured the proportion of slow wave sleep, the proportion of REM sleep, and how often they experienced arousal during the night. The scientists found that having less slow-wave sleep ...

People on TikTok and other social media say they feel more alert when they have had fewer hours of sleep—but sleep scientists ...