https://en.wikipedia.org/wiki/Why_We_Sleep https://en.wikipedia.org/wiki/Why_We_Sleep Some effects are probably exaggerated (as mentioned in the wiki) but it's

https://en.wikipedia.org/wiki/Why_We_Sleep https://en.wikipedia.org/wiki/Why_We_Sleep Some effects are probably exaggerated (as mentioned in the wiki) but it's clear that evolution highly prioritized sleep across many species