Submarine Searches Lake Michigan (IMAGE) Purdue University Caption Researchers at Purdue University are using this robotic submarine and other specialized tools in Lake Michigan to gather biological and environmental data to learn how young fish vital to the ecosystem may cope with future climate change. The slender, battery-powered vehicle is about 3' long and is programmed to trace specific routes in collecting data. Credit Cary Troy, Purdue University School of Civil Engineering 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.