Anthropogenic Modifications (IMAGE) University of the Basque Country Caption The different categories of anthropogenic modifications found on Neanderthal bones at Goyet. Femur I (left) displays signs of having been used as a percussor for shaping stone, and femur III (right) bears cut marks indicating the processing of remains during butchery activities. Femur III also bears signs of retouching left behind after being used to retouch the edges of stone tools. Scale = 1 cm. Credit Asier Gómez-Olivencia et al. Usage Restrictions None 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.