Chimp Aggression (IMAGE) Duke University Caption A male chimpanzee (left, with back to camera) menaces a fleeing female in a typical display of aggression. A new study finds that males who are consistently aggressive tend to sire more babies. Credit Jane Goodall Institute/ Jane Goodall Usage Restrictions Must credit "Jane Goodall Institute/ Jane Goodall" License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.