Aging Tissue (IMAGE) Brown University Caption Tissue from two flies show increased expression of a reporter gene (blue staining) with age. The fly on the left was 10 days old. The fly on the right was 50. Credit Helfand lab/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.