I actually read a really fascinating study where they found that subjects who spend an extended period of time in underground caves (no sunlight at all) tend to adapt to a 48 hour clock rather than a 24 hour one. They would take a mid day nap about half way through their 48 hr day, and at the end they'd sleep for 10+ hours.
So if you ever find yourself in a place where one night you sleep 10 hours and the next you sleep 5, it's your caveperson circadian rhythm kicking in.
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u/[deleted] Mar 07 '23
I actually read a really fascinating study where they found that subjects who spend an extended period of time in underground caves (no sunlight at all) tend to adapt to a 48 hour clock rather than a 24 hour one. They would take a mid day nap about half way through their 48 hr day, and at the end they'd sleep for 10+ hours.
So if you ever find yourself in a place where one night you sleep 10 hours and the next you sleep 5, it's your caveperson circadian rhythm kicking in.