Chimpanzees that had once formed a cohesive community in Uganda split into factions and turned violent, according to a new study. Nearly 30 chimps were killed, including 19 infants.

By Will Dunham April 9 (Reuters) - For two decades, researchers observed members of the Ngogo chimpanzee group of Kibale National Park in Uganda spend their days eating fruits and leaves, resting, traveling and grooming in their tropical rainforest abode.

Using over 30 years of observations, scientists have described for the first time how this "exceedingly rare" split arose.

The extreme investigators at How to Survive explain why chimpanzee attacks are so violent and hard to escape.