Killer chimps fuel debate on how war began
In 1998, researchers in Uganda saw a group of male chimpanzees beating on and swaggering around another male chimp’s freshly killed body. Its windpipe, fingernails and testicles were torn out.
Apes of war... is it in our genes?
Research into the aggressive behaviour of male chimpanzees, our closest biological ally, suggests that the urge to go to war is in our DNA and that only women can stop it, says Sanjida O'Connell