Kanywara chimpanzees playing (IMAGE) Tufts University Caption Young Ginger (3-4 mo) climbing her mother, Gola’s, feet. This image was captured during a brief pause between Ginger biting her mother’s toes as Gola tickled her Credit Dr. Kris Sabbi Usage Restrictions Use permitted for stories on research published in Current Biology: Ecological variation in adult social play reveals a hidden cost of motherhood for wild chimpanzees License Original 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.