When you zone out after pulling an all-nighter, the brain flushes outCSF), which surrounds the brain and spinal cord and is ...

Masked intruders broke into your house. They want to hurt you. Fast, grab something and fight back. But wait, you’re still asleep. This is just a bad dream. The reality is far worse. You’re swinging a ...

Walker explains that early sleep cycles are rich in deep, non-REM sleep—the kind that restores muscle, strengthens immunity, ...