Measuring Methane on Mars (IMAGE) Johns Hopkins University Caption Conceptual diagram of NASA’s Curiosity rover measuring methane on the surface of Mars. Credit Copyright © John P. Ortiz 2022. Usage Restrictions Free to use with caption and credit provided 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.