I know its about the rotation of the earth, night & day, but if we lived in planet with longer day will our sleep cycle be different?? And can you train yourself to a different cycle like 36 hours awake and 4 hours sleep??
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The exact number 24h is realy just because thats how long a day is.
I remember there being some experiments by NASA and i think they found that something like 28h would actualy even be better. So its not a precise number of hours its more a range that humans can deal with and 24h is just the most convient.
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