Lower Second Molar (IMAGE) Proceedings of the National Academy of Sciences Caption This is a three-rooted lower second molar in a Denisovan individual from Xiahe, China. Credit Image courtesy of Jean-Jacques Hublin. 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.