Lead author (IMAGE) University of Massachusetts Amherst Caption Christine Langton carried out this research as part of her Ph.D. dissertation 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.