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

A chimp community in Kibale National Park has split into rival groups, with one attacking the other as researchers—including some in Arizona—search for answers.

The once close-knit community of Ngogo chimpanzees have been at loggerheads for the last eight years.

Researchers have documented a permanent split between the largest-known group of wild chimpanzees, which erupted into a lethal civil war over the past several years — findings that could help ...