Chimpanzees in Uganda locked in vicious 'civil war', say researchers

The world's largest known group of wild chimpanzees, the Ngogo community, has been in a civil war for eight years, with 24 recorded killings, including 17 infants. Researchers led by Aaron Sandel note that the once united chimpanzees are now divided into two antagonistic groups. Several factors, including competition for resources and the deaths of key members, may explain this escalating violence.