Evans Laboratory (IMAGE) Salk Institute Caption From left: Ronald Evans, Mara Sherman, Ruth Yu, Ann Atkins, Tiffany Tseng and Michael Downes Credit Salk Institute Usage Restrictions With credit and related coverage 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.