Bsmith0799 t1_j3lnz3x wrote
Reply to comment by Delamoor in TIL Pluto hasn't completed an orbit around the sun since its discovery. Pluto's orbit takes about 248 years, and Pluto was discovered in 1930. by irbinator
People in Alaska sleep, don't they? And Alaska has areas where the sun doesnt rise and set the way we're used to. So I'm sure we'd sleep.
Hikaru755 t1_j3lx1iy wrote
People haven't evolved sleep in Alaska, though. Sleep evolved waaaaayyy before humans even existed, let alone started living that close to the poles. And we've not been around for long enough for evolution to change anything about something so deeply integrated into the way our biology works as sleep.
chairfairy t1_j3lslh1 wrote
Harder to guess because Alaskans still have circadian rhythms - that's a basic biological function built into your brain, that a lot of life on earth evolved with. (I assume circadian rhythm predates humans, because other animals have it, too.)
In a tidally locked world, there would be no circadian rhythm, at least not one driven by the day/night light cycle. I mean yeah they'd probably still need to sleep but the underlying biological mechanisms would be completely different
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