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.

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 cognitive function is still being explored. And now, new research has ...

It makes sense that getting quality deep and REM sleep is key to our ability to function. Adults need about seven to eight hours of sleep to be healthy, while teens and younger children need much ...

The research team, led by Dr. Gawon Cho, a postdoctoral associate at the Yale School of Medicine, studied 270 individuals ...

Sleep-deprived jackdaws spent more time in deep, symmetrical sleep – especially early in the night, when the need to recover ... sleep and non-REM sleep roughly every 90 minutes. Birds go through ...

It makes sense that getting quality deep and REM sleep is key to our ability to function.Adults need about seven to eight hours of sleep to be healthy, while teens and younger children need much more.