Studying Single Molecules (IMAGE) Iowa State University Caption Sanjeevi Sivasankar, an assistant professor of physics and astronomy, demonstrates a microscope he's developing that can reveal the individual characteristics of a biological molecule. Credit Photo by Bob Elbert/Iowa State University Usage Restrictions None 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.