Chimpanzees in Uganda locked in vicious ‘civil war’, say researchers BBCThese Chimps Began the Bloodiest ‘War’ on Record. No One Knows Why. The New York TimesChimpanzees’ bloody ‘civil war’ may offer insight into human conflict The TimesScientists stunned as chimpanzees turn on friends in killing spree ReutersTwo hundred chimpanzees are embroiled in a ‘civil war’ Scientific American
