Figure 5 (IMAGE) University of Otago Caption Koshima Island macaque (left) and Neandertal (right), both upper central incisors showing large vertical scratches. PHOTOS: Ian Towle and John C. Willman. Credit Supplied Usage Restrictions None 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.