A rare chimpanzee ‘civil war’ is happening. It could teach us about human conflict

Aaron Sandel can pinpoint when it all started. The codirector of the Ngogo Chimpanzee Project had been observing a group of apes on June 24, 2015, in Uganda’s Kibale National Park, where the project is located, when he suddenly noticed the chimps fall silent. Several began grimacing, a facial expre...

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