Martin Hetzer and Abigail Buchwalter, Salk Institute (image) Salk Institute Share Print E-Mail Caption From left: This is Martin Hetzer and Abigail Buchwalter. Credit Salk Institute Usage Restrictions with credit and related coverage. 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.