Play develops similarly in chimps and humans

The re­search­ers found that chim­pan­zee sol­i­tary play peaks in in­fan­cy, and the time spent in so­cial play is about the same be­tween in­fants and ju­ve­niles. But the type of so­cial play changed quite a bit as the an­i­mals grew up, in terms of meas­ures like com­plex­ity and play­mate choice.