Two Adult Male Baboons Fighting (IMAGE) U.S. National Science Foundation Caption Two adult male baboons fighting at very close range. The one on the left is giving a threat by staring and raising his eyebrows, perhaps also slapping the ground; the one on the right exhibits a classic fear grimace, perhaps accompanied by a scream. Such a grimace also bares the male's teeth, reinforcing the reality that even a lower-ranking male can inflict debilitating, potentially lethal damage in a contact fight. Each male seems to be both lunging and pulling back from an attack, exhibiting the common ambivalence about actually engaging in physical combat that has the potential to lead to puncture wounds. Credit Jeanne Altmann, Ecology and Evolutionary Biology Dept., Princeton University Usage Restrictions None 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.