Author image (IMAGE) Salk Institute Caption Caption: Top row from left: Leo Li and Geoffrey Wahl. Bottom row from left: Nikki Lytle and Luke Wang. 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.