Chimp Family Using Tools (IMAGE) University of Calgary Caption A chimpanzee mother cracks a nut using a rock hammer and anvil in Republic of Guinea. Credit Tetsuro Matsuzawa, Kyoto University Usage Restrictions Use credit information please 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.