Enhanced NASA Images Show Potential for Buried Ice Near the Martian Equator
NASA made headlines around the world back in 2015 when it discovered evidence of briny water flowing on the surface of Mars. The agency detected hydrated salts flowing within recurring slope lineae, or RSLs, which are streaks that appear on the sides of craters.
It remains unclear whether or not RSLs are salts. Some studies suggest the water comes from trace amounts available in the Red Planet’s atmosphere, while others say the streaks appear to be dry sand, especially because the streaks are straight, not wavy like one would expect from water.