Gorilla and Lemur Skuls (IMAGE) North Carolina State University Caption The skulls of a gorilla and lemur with the teeth "digitally dissected" in order to study their tooth root surface areas. Credit Credit: Deutsch and Hartstone-Rose. Usage Restrictions Use with credit. 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.