Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. A new study finds chimp and ...

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, the chimpanzees. But is this ...