Genetics and Time (IMAGE) Brown University Caption This shows Brown University researchers studying the biology of aging have found that over time, mouse cells loosened control over parasitic "retrotransposable elements" in the genome. Credit John Sedivy/Brown University Usage Restrictions with credit 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.