Lead author (IMAGE) University of Massachusetts Amherst Caption Eric Siegel is a lab technician about to begin his Ph.D. studies in microbiology at UMass Amherst. Credit UMass Amherst Usage Restrictions None License Original 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.