Humans don’t get enough sleep. Just ask other primates.

People devote more time to learning, at the expense of shut-eye, researchers propose

ring-tailed lemurs

SNOOZE TIME  Humans get much less sleep than expected for a primate  with our biological and lifestyle characteristics, a study finds. Most other studied primates, including ring-tailed lemurs like these, sleep about as much on average as researchers estimated they should.

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People have evolved to sleep much less than chimps, baboons or any other primate studied so far.