DNA Clock (IMAGE) Michigan Medicine - University of Michigan Caption This is an illustration for the sped-up aging observed in the telomeres of the chromosomes of first-year medical residents, called interns. Credit University of Michigan Usage Restrictions Credit University of Michigan 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.