Bernhard Mayer, University of Calgary (IMAGE) University of Calgary Caption The study was led by researcher Bernhard Mayer in the Department of Geoscience, University of Calgary, and Mathieu Sebilo at the Université Pierre et Marie Currie in Paris, France. Credit Bernhard Mayer. 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.