William Arnold and Team, University of Minnesota (image) University of Minnesota Share Print E-Mail Caption William Arnold, University of Minnesota, and his research team studied Minnesota freshwater lakes. Credit William Arnold / University of Minnesota Usage Restrictions With proper credit. 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.