More Active with Age (IMAGE) Oregon State University Caption While young flies express certain stress-response genes weakly or not at all, an old fly like the one on the right express these 'late life cycler' genes rhythmically and robustly. Credit (Graphic courtesy of Oregon State University) 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.