Mars Crater Lakes Diagram (IMAGE) University of Texas at Austin Caption New research from The University of Texas at Austin has used dry Martian lake beds to determine how much precipitation was present on the planet billions of years ago. Credit Gaia Stucky de Quay 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.