Juvenile orangutan (IMAGE) Max-Planck-Gesellschaft Caption Juvenile orangutan pulling its mother's hair. Credit BOS Foundation BPI Usage Restrictions The image can only be used in connection with reporting on the study “Laumer I.B., Winkler S, Rossano F, Cartmill EA (2023) Spontaneous playful teasing in four great ape species. Proceedings of the Royal Society B, DOI: 10.1098/rspb.2023.2345” and can be used free of charge if the image credit (BOS Foundation BPI) is mentioned. 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.