A study by the universities of Manchester and Liverpool observing monkeys has found that those in the middle hierarchy suffer the most social stress. Their work suggests that the source of this stress ...

Researchers at Kyoto University spent more than 600 hours studying 20 captive chimps to determine if urination is socially ...

The monkeys on this island display a broad range of social behaviors, including group competition, social hierarchy formation, and alliance formation and dissolution. All of these behaviors are also ...