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
Only thing we do know for a fact is that sleep is so vital that any creature with even a semblance of central nervous system needs sleep and that denying that sleep is fatal.
Maybe it’s just something as simple as that brain cells get tired and need rest or something more complex but we just don’t know for sure, we know the effects but not the cause or reason other similar mystery is why do we and many other creatures see dreams?
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