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

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.

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

Waking up after eight hours of sleep should feel refreshing. Yet, many people open their eyes feeling just as exhausted as when they went to bed. It's ...

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

Need another reason to prioritize your sleep? Not spending enough time in the two deep stages of sleep may hasten the ...

Infant sleep patterns fluctuate significantly during the first year, with newborns sleeping in short bursts and gradually ...

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

A link has been found between neuroactivity during sleep and brain atrophy in areas vulnerable to the degenerative disease.

New research reveals that lower proportions of specific sleep stages are associated with reduced brain volume in regions ...