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The "two sleeps" thing is entirely about long nights far away from the equator. It never really happened in tropical climes, or during summer. Cheap lighting h
by maoistinquisitr 9y ago
The "two sleeps" thing is entirely about long nights far away from the equator. It never really happened in tropical climes, or during summer.
Cheap lighting has simply allowed people away from the equator to sleep in the more natural pattern, if you grant that humans are less adapted to cold climes than to tropical ones.