GALE 3 (IMAGE) Rice University Caption A comparison by Rice University scientist Michael Thorpe of chemical and climate weathering of sedimentary rock in Mars' Gale Crater indicate the region's mean temperature billions of years ago was akin to current conditions on Iceland. Credit Rice 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.