Female and male primates often form close bonds, but not purely out of affection. Close relationships usually evolve when there is a clear benefit for both parties, with protection and reproductive ...

New study finds that large group size and mating systems where males have multiple mates drove evolution of deeper male voices in primates, including humans UNIVERSITY PARK, Pa. — Deeper male voices ...

Biological anthropologists and evolutionary psychologists commonly take it for granted that human monogamy has a biological basis. Desmond Morris was an influential early advocate. His 1967 ...

Charlie Nunn and colleagues predicted that primates with promiscuous mating habits would be more exposed to STDs and would hence show adaptations to combat higher infection risks. Sure enough, ...

“Spanking the monkey”, “petting the poodle” and “pulling the python”: all fitting euphemisms for masturbation, and closer to the truth than you might imagine. Self-pleasure is common across the animal ...

Northern muriquis, which live in the Atlantic forest of Brazil, are one of the most endangered species of monkey in the world. Choosing good mates and rearing thriving offspring are key to the species ...

Why be social? And, why not be? What are the costs and benefits of sociality, and what types of sociality characterize nonhuman primates? Given all of these potential costs of group living, why do so ...

Humans may be far more monogamous by nature than previously thought, researchers say. Monogamy in humans is comparable more to the exclusive mating seen in meerkats and beavers than in our primate ...