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.

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.

The long-running conflict in a formerly unified community, the second ever observed, adds to Jane Goodall’s studies about a different chimp war in the 1970s.

For two decades, the chimpanzees of Ngogo moved through Uganda’s Kibale National Park as a single society, more than 200 strong, the largest wild chimpanzee community ever documented. They groomed together,

Young chimpanzees learn their communication style from their mother and maternal relatives, but show little similarity to the communication behavior of their father and paternal relatives, according to a study published in the open-access journal PLOS ...

Chimpanzees in Uganda use plants to treat wounds and help injured companions, revealing potential roots of human medicine.

Why the Latest Science Leads Us to a New Theory of Human Nature, by Jonathan Leaf (Bombardier, 320 pp., $21) Ever since Darwin, biologists have believed that much could be learned about human nature from apes and monkeys,