Robin Singleton (IMAGE) University of Oklahoma Caption University of Oklahoma graduate student Robin Singleton examines material from Teotihuacàn under a microscope in the Laboratories of Molecular Anthropology and Microbiome Research ancient DNA lab. Credit Photo by Courtney Hofman. 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.