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But the largest number of primate species--thirty-four--have a promiscuous system in which females routinely associate and copulate with multiple male...more

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It's striking that Native Americans evolved no devastating epidemic diseases to give to Europeans in return for the many devastating epidemic diseases...more

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Sex in social mammals is generally carried out in public, before the gazes of other members of the troop.

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Perhaps our greatest distinction as a species is our capacity, unique among animals, to make counter-evolutionary choices.