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

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

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

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 ...

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

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

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

A growing body of research suggests same-sex behavior in nonhuman primates is important to social connections.

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

Cooperative behaviour and prosociality in nonhuman primates constitute a vital area of research that illuminates the evolutionary origins of complex sociality. Studies indicate that primates employ a ...

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