Three-Rooted Lower Second Molar (image) New York University Share Print E-Mail Caption Three-rooted lower second molar of Xiahe Denisovan individual. Credit The Max Planck Institute Usage Restrictions In conjunction with this study only. Share Print E-Mail 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.