Lone chimpanzee (IMAGE) American Institute of Biological Sciences Caption Chimpanzee sitting alone. Members of the species are known to distance themselves from sick individuals. Credit Dominik Scythe on Unsplash 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.