Pasa and Yoyo, two female chimpanzees, are best friends. They spend their afternoons lounging together in the warm grass of ...

That behavior looks very much like the kind of evidence-based decision-making that human subjects show in classic psychology experiments, where people weigh sample data before betting on an outcome, a ...

Further experiments conducted beginning in the 1940s showed that chimps lacked the necessary anatomical structures to speak English—though one chimp, named Viki, was ultimately able to say mama, papa, ...

Human relationships (or should I say, chimpanzee relationships?) are truly profound, aren't they? Even if you are usually ...

A study linked the ancient PTERV1 retroviral insertion in chimpanzees to suppressed LINC00662 activity, which is involved in ...

Chimpanzees share approximately 98.8% of their DNA with humans, yet their powerful muscles, enormous canine teeth and complex ...

Friendship is not only about helping someone when things are going well. Close relationships also depend on what happens when there is competition, disappointment, or a chance to take something at ...

When given a choice between cooperating or competing, chimpanzees choose to cooperate five times more frequently, Yerkes National Primate Research Center researchers have found. This, the researchers ...

Bossou: 33 Years / Tetsuro Matsuzawa and Tatyana Humle -- Location and ecology / Tatyana Humle -- The demography and reproductive parameters of Bossou chimpanzees / Yukimaru Sugiyama and Shiho Fujita ...