Female Bonobo Yawning (IMAGE) PeerJ Caption Scientists have found that differences in levels of emotional contagion between humans and bonobos are attributable to the quality of relationships shared by individuals. Credit Elisa Demuru 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.