Modeling Animals' Social Networks (IMAGE) University of Pennsylvania Caption Researchers at the University of Pennsylvania developed a simple mathematical model that describes how animal social networks arise. The model recapitulated important qualities of observed social networks of several species, including spotted hyenas. Credit University of Pennsylvania Usage Restrictions In context of reporting 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.