Walker 1 (IMAGE) Washington University in St. Louis Caption An adult female chimpanzee with her offspring fishes for termites at Gombe, Tanzania. This image provided to accompany media for "Teaching varies with task complexity in wild chimpanzees," in PNAS the week of Dec. 23, 2019. Credit Provided courtesy of Kara Walker. Usage Restrictions ***This article is under embargo until Monday, December 23, at 3 pm US ET*** License Licensed 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.