Why do we NEED sleep?
In: Biology
Brain is very busy and complicated. Doing work produces waste output. The waste output needs to be cleaned out. Essentially, the brain needs maintenance just like a car would.
Why it needs sleep and why humans need 8 hours is also just based on evolution. Other animals have different strategies, like sleeping only half their brain at a time.
But pretty much every cell that is alive has some kind of cycle, whether it’s a 20 minute cycle or the human circadian cycle of about 24 hours. Pretty much every living thing needs maintenance because the work of living produces waste, and it’s inefficient to be 100% active 100% of the time.
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