A recent study into same-sex behavior in primates finds that social organization and ecological factors, including climatic conditions, influence this behavior. In gorilla groups, same-sex relations ...

Humans are far from the only primates engaging in same-sex sexual activity. A new study found instances in which 59 nonhuman primate species, including bonobos, chimpanzees and macaques, have taken ...

A new study comparing 59 species of primates linked same-sex sexual behavior to scarce resources and more predators in socially complex species. The findings show diverse sexual behaviors are common — ...