Contact: Yael Franco
Public Library of Science
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
Related news release: Chimps play like humans: Playful behavior of young chimps develops like that of children