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 ...

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

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

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

The riskiest behavior in humans peaks in adolescence. Researchers from the University of Michigan and James Madison ...

Chimpanzees show physical risk taking peaks in infancy, not adolescence, highlighting the powerful role of supervision in ...

Adolescents are known for risky behavior, with teenagers in the US more likely than younger children to die from injury.

Ai, a "genius" chimpanzee who could recognise more than 100 Chinese characters and the English alphabet, has died aged 49, ...

In humans, teens do the most dangerous things. In chimpanzees, that honor goes to toddlers. The difference may lie in ...