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There may be water on Mars, but not much
Remember those weird dark streaks that NASA's Mars Reconnaissance Orbiter found last September? These recurring slope lineae (RSL), as they're called, were originally thought to contain liquid water. On Mars, liquid water would obviously be a huge deal because it means both potential source of life and potential resource. Well, it turns out that there isn't nearly as much water in those RSLs as astronomers had hoped and certainly none that's potable. What's more, new analysis has estimated that the amount of liquid surface water on Mars cannot exceed that of Earth's driest deserts.
