From an evolutionary perspective, how did our species evolve to have derp sleep for long hours? I understand that sleeping conserves energy, but it would also make humans vulnerable to predators and not getting killed should take priority over saving energy
In: Biology
In addition to the biphasic sleep pattern and morning dove vs. night owl explanations, keep in mind we need 7 hours of deeper sleep while other great apes sleep for 9-10 hours a day of lighter sleep.
So we did evolve with that constraint in mind, partly by reducing the total hours we were asleep during the day.
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