Lab DNA Analysis (IMAGE) University of Zurich Caption An undergraduate researcher analyzes DNA from 1,000-year-old human teeth for genetic adaptations to milk consumption. Credit Christina Warinner, UZH 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.