Alan Wanamaker: Sensors under the Sea (IMAGE) Iowa State University Caption Iowa State University's Alan Wanamaker studies clam shells from the Atlantic for clues to the ocean's past climate. Credit Bob Elbert/Iowa State University 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.