Rare, violent rift discovered in Ngogo chimpanzee group from 'Chimp Empire' (opens in new tab)

The largest group of wild chimpanzees known to scientists has permanently split in two — something that is extremely rare.Scientists with Arizona State University and The University of Texas at Austin are the first to clearly document the permanent divide and the intergroup violence that followed. The study draws on three decades of field observations of the Ngogo chimpanzees of Kibale National Park, Uganda, a population featured in the Netflix documentary series "Chimp Empire."