4 Wild Things Your Brain Does While You Sleep

In this reel

Your brain is secretly busy every single night — here's what it's actually up to.

Transcript

While you sleep, your brain quietly moves everything you learned today into long-term storage. Your brain actually flushes out built-up waste at night — it cleans itself like a dishwasher while you dream. When you dream, your brain lights up almost the same way it does when you are actually awake and living it. Skip enough sleep and your brain actually starts to shrink — even a few bad nights can change your mood and memory.