Eli5: Why do we need to sleep so much, what happens in the body when asleep that cannot happen while normal resting or relaxing? Or is it just for the brain?
In: Biology
You are thinking about this backwards. We sleep because we didn’t need to be fully alert 24/7 in order to survive. If our body could survive by sleeping all the time it would only do that. Why the hell would it wake up and walk around doing work and burning calories when it doesnt need it. It only wakes up and becomes alert because it knows it won’t survive if it stays asleep forever.
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