Compact Reconnaissance Imaging Spectrometer for Mars

Dark, narrow streaks, each about a tenth of a kilometre long, called recurring slope lineae flowing downhill on Mars are inferred to have been formed by contemporary flowing water. In 2015, scientists detected hydrated salts on these slopes at Hale crater, suggesting the streaks are formed by liquid water. Credit: NASA/JPL/University of Arizona

NASA Finds More Signs of Liquid Water on Mars