Why do we sleep?
Brain's Nightly Rinse
Why do we sleep?
Every night, like clockwork, your body makes you do something that seems completely ridiculous. You lie down, close your eyes, and for eight hours you're just… gone. Unconscious. Vulnerable. Not eating, not working, not doing anything useful. Why would evolution design us this way? What's so important that your brain forces you offline every single day?
Here's the first reason, and it's wild: your brain is literally full of garbage. All day long, your neurons fire and work and think, and that activity creates waste—broken proteins, cellular debris, metabolic junk. It piles up between your brain cells like trash in a stadium after a concert. If it stays there, it gums up the works.
