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ELI5: What exactly is "tired"? (What happens in the brain/body?) How does sleeping "recharge" us, and how could we die from deprivation of sleep?
ELI5: What exactly is "tired"? (What happens in the brain/body?) How does sleeping "recharge" us, and how could we die from deprivation of sleep? * /r/explainlikeimfive
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