While human culture has evolved dramatically - from the Stone Age to the Space Age - chimpanzee cultures appear relatively ...

Chimpanzees were more likely to find grooming behavior contagious when they observed it in another individual that they had a ...

A multiyear study of dozens of wild, adult chimps suggests that play helps reduce tension and boost cooperation among individuals.

Chimpanzees are more likely to engage in play or groom each other if they see others performing these social behaviors first, ...