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

Chimpanzees that had once formed a cohesive community in Uganda split into factions and turned violent, according to a new ...
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Bonobos are just as aggressive as chimps, but there's a key difference — the female bonobos

"Hippie" bonobos are just as aggressive as "warrior" chimpanzees, according to a new study. However, the findings also reveal some key details about which sex is instigating the aggression.

Violent split in chimpanzee group offers clues on roots of human conflict: Research

Researchers have documented a permanent split between the largest-known group of wild chimpanzees, which erupted into a ...
Mongabay News

In zoos, ‘peaceful’ bonobos are just as aggressive as chimps, study suggests

A new study of our two closest living relatives finds that, at least in zoos, bonobos may not be more peaceful than ...
AOL

Are bonobos truly the peaceful counterparts to chimps? New study says no

WASHINGTON, March 13 (Reuters) - Bonobos for years have had the reputation of being the cool hippies of the simian world, with a "make love, not war" ethos, in contrast to their belligerent cousins, ...