Play Between Infants (image) PLOS Share Print E-Mail Caption This images shows a vigorous play session between two infant chimpanzees. The individual on the left is biting a foot of his playmate. Credit Elisabetta Palagi Usage Restrictions Citation: Cordoni G, Palagi E (2011) Ontogenetic Trajectories of Chimpanzee Social Play: Similarities with Humans. PLoS ONE 6(11): e27344. doi:10.1371/journal.pone.0027344 Share Print E-Mail 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.