A Chimpanzee (IMAGE) George Washington University Caption There is significant individual variation in how chimpanzees, like this one at Gombe National Park, experience pigment loss. Credit Ian C. Gilby Usage Restrictions With permission 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.