How a group of chimpanzees started a ‘civil war’ in a once-close-knit community | CNN

In 2015, Ngogo chimpanzees wince when they hear the voices of other chimpanzees, reassuring each other.

Aaron Sandel can pinpoint exactly when it all started. On June 24, 2015, the co-director of the Ngogo Chimpanzee Project was observing a herd of great apes in Uganda’s Kibale National Park, where the project is based, when he suddenly noticed that the chimpanzees were silent. Some of the people started frowning, their expressions showing … Read more