Mars Rover - Lunar Rover (IMAGE) University of Maryland Caption A research team, including UMD Geology Assistant Professor Nicholas Schmerr, repurposed data from instruments aboard NASA’s Curiosity rover (left) to measure subtle changes in gravity on Mars, in much the same way a lunar rover (right) measured gravity on the moon during the Apollo 17 mission in 1972. Credit NASA/JPL-Caltech 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.