<i>C. elegans</i>, Roundworms (IMAGE) Salk Institute Caption Salk scientists found that insulin plays a role in mediating roundworms' perceptions and behaviors. This image shows a C. elegans, the species of roundworm the Salk researchers studied. Credit Courtesy of the 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.