[/caption] NASA’s Mars Reconnaissance Orbiter has revealed hundreds of small fractures exposed on the Martian surface that billions of years ago directed flows of water through underground Martian sandstone. Researchers used images from the spacecraft’s HiRISE (High Resolution Imaging Science Experiment) camera. Images of layered rock deposits at equatorial Martian sites show the clusters of … Continue reading "Ancient Groundwater Flows Revealed on Mars"