A once large and peaceful group of chimpanzees in the western forests of Uganda has now split into two, causing a rare “civil war” among the primates.

Chimpanzees at Uganda’s Ngamba Island Sanctuary can do what was once considered an exclusively human trait: form expectations on the basis of evidence, but revise them on learning new facts.

There’s a new chimpanzee in the world, and it turns out to be one we’ve known all along. Jane Goodall’s pioneering study in Gombe National Park, Tanzania, began in 1960, well over a half-century ago.

When I talk about my time in the field, and how wonderful and fascinating chimpanzees are, one thing that often surprises people is that chimps eat meat. Listeners are truly shocked—"Wait what?" they ...

When people talk to each other, their conversations usually include many fast twists. Humans do not naturally talk in Shakespearean soliloquies, but by regularly interrupting and wildly gesticulating.