Biologists tend to look at the animal kingdom and try to categorize things in an organized fashion. But nature has a way of defying our neat little categories. Take something as common as same-sex ...

More than 59 different primate species have been observed participating in some kind of same-sex behaviors, making it extremely common.

Same-sex behavior is widespread in primates and may help strengthen social bonds and improve survival under challenging ...

Gay apes are a thing!

Homosexual behavior in primates has a deep evolutionary basis and is more likely to occur in species that live in harsh environments, are hunted by predators or live in more complex societies, ...

Nonhuman primates like bonobos and chimpanzees might engage in same-sex sexual activities to strengthen bonds, particularly ...

Many primate species have been observed engaging in same-sex sexual behavior. A new study suggests it likely developed evolutionarily to help reduce conflict and build bonds.

Primates form same-sex sexual behavior alliances to gain rank and mating opportunities Male primates use same-sex bonds as ...

Same-sex behavior is common across the animal kingdom—more than 1,500 species are estimated to have been observed engaging in same-sex behavior, from spiders and nematodes to bonobos and fish. A new ...

Almost 60 different primate species exhibit same-sex sexual behaviors.

Adaptation and behavior in the primate fossil record / Callum F. Ross ... [et al.] -- Functional morphology and in vivo bone strain patterns in the craniofacial region of primates: beware of ...