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.

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.

Ahead, we’re diving into all things REM sleep vs deep sleep for Sleep Awareness Week 2025 — including what happens during each stage, when they occur, how much of each we need. Plus ...

we’re also regulating our mood and consolidating our memories. Rapid eye movement, or REM, sleep was discovered in 1953—more than 15 years after stages 1 through 4 had been mapped—by Eugene ...