Macaques grooming each other (IMAGE) University of Exeter Caption A social network of macaques grooming each other on Cayo Santiago Credit Lauren Brent Usage Restrictions This image may only be used with reports of this research License Original 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.