Aaron Sandel can pinpoint when it all started. The codirector of the Ngogo Chimpanzee Project had been observing a group of ...

Charla Nash arrived at Sandy Herold’s house as she usually did. They’d been close friends for years. Little did she know this visit would change her life forever. As soon as Nash stepped inside, ...

New study describes what may be the first case of a unified community of chimps turning on itself ...