Infants torn from mothers, testicles ripped off: Study describes vicious chimpanzee infighting

For years, two sets of chimpanzees lived as one in Uganda’s Kibale National Park — grooming, interacting and patrolling their territory in a cohesive community.Then suddenly, one set charged the other, touching off yearslong bloodshed that researchers are comparing to a human civil war.“It was just chaos,” said John Mitani, a professor emeritus in anthropology at the University of Michigan who had been following the chimpanzees for two decades when the violence began in 2015. “They started to scream, shout, chase each other.”For three years after the outbreak, Mitani and his collaborator, Aaron Sandel, an associate professor of anthropology at...