Iowa State University Research Group (IMAGE) Iowa State University Caption Lauren Sullivan, doctoral student; Lori Biederman, associate scientist; Stanley Harpole, assistant professor; Paul Frater, master's student; and Brent Mortensen, doctoral student were part of an international research team that is having results published in the journal Science this week. Credit Courtesy 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.