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

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

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

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

It's no secret that a good night's sleep is key to a healthy brain. However, the full extent of the importance of rest on our ...

Spending lower proportions of time in two deep sleep stages — including REM sleep — may be linked to volume changes in ...

During deep sleep, the brain sweeps out toxins and dead cells while also repairing and restoring the body for the next day. While we dream during REM sleep, the brain is busy processing emotions ...

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.

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

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

Researchers from the Yale School of Medicine found that individuals who spend less time in slow-wave and rapid eye movement (REM) sleep had smaller volumes in brain regions linked to Alzheimer's. This ...