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f38zf5vdt
on Aug 12, 2022
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Why thinking hard makes us feel tired
Indeed, it's called the glymphatic system. We evolved to have a circadian system that drains brain waste products during sleep. There are probably other unknown neurological consequences of sleep that remain to be detailed.
https://en.wikipedia.org/wiki/Glymphatic_system
https://www.nature.com/articles/s41467-020-18115-2
bmitc
on Aug 12, 2022
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It's not just us, as in humans. (Not saying you said otherwise.) Practically all animals sleep, even invertebrates like octopuses.
misja111
on Aug 12, 2022
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Even spiders do:
https://www.cbsnews.com/news/spiders-may-sleep-and-dream-lik...
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Search:
https://en.wikipedia.org/wiki/Glymphatic_system
https://www.nature.com/articles/s41467-020-18115-2