Sam Pfaff, Salk Institute (image) Salk Institute Share Print E-Mail Caption Sam Pfaff is a researcher at the Salk Institute for Biological Studies. Credit Image: Courtesy of Denis Poroy/AP, © HHMI Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. Share Print E-Mail 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.