Fruit Fly Intestinal Tissue, (2 of 2) (IMAGE) Salk Institute Caption The Salk scientists and their collaborators discovered that activating the fruit fly version of the PGC-1 gene delayed this aging process, while simultaneously extending lifespan. Credit Images: Courtesy of Salk Institute for Biological Studies Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.