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Your brain eats itself every single night… But don’t worry — it’s actually saving your life. While you sleep, your brain activates something called “cleanup mode.” It removes weak or unnecessary connections between brain cells. This process is called synaptic pruning. It helps your brain stay efficient, sharp, and focused. Without it… your brain would get overloaded with useless information. So yeah… your brain is literally deleting parts of itself… just to make you smarter.