The researchers found that same-sex behavior was more common in primate groups with clear hierarchical structures and those ...

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

A new study posits that same-sex sexual behavior developed to help primates in complex social groups ease tension, reduce ...

As animals go about their lives ― eating, fighting, having babies ― they don’t always follow the script laid out for them by ...

Biologists tend to look at the animal kingdom and try to categorize things in an organized fashion. But nature has a way of ...

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

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

Homosexual behavior in primates has a deep evolutionary basis and is more likely to occur in species that live in harsh ...

Data from 491 non-human primate species reveals reports of same-sex sexual behavior (SSB) in 59, and the distribution is not ...

Same-sex behavior is common across the animal kingdom—more than 1,500 species are estimated to have been observed engaging in ...

Past theories have suggested that animals exhibit SSB to increase group cohesion, to signal dominance among a larger group, ...

Bonobo chimpanzees are unique among primates because they do not kill other bonobos. … They still showed increased alertness ...