Young chimpanzees enjoy some fruit. (Martin Harvey/The Image Bank RF/Getty Images) Humans and chimpanzees are remarkably ...

Chimpanzees appear to execute Rational Evidence-Weighing in complex decision-making tasks. The experiments conducted demonstrated that chimps changed their minds when presented with stronger evidence.

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

ABUJA, Nigeria — A group of chimpanzees once used in laboratory hepatitis B vaccine experiments has received health checks at their new home in Liberia, in hopes of giving them a second chance at a ...

New research on chimpanzees is forcing scientists to rethink where the line between human and animal minds really lies. In carefully designed experiments, chimps are not just grabbing at treats or ...

Chimpanzees infected with hepatitis C virus in experiments decades ago at last received treatment using drugs made for humans ...