Water on Mars: A Brief (and Extremely Long) History

The surface of Mars, new research suggests, is 2 percent water — yet another reminder that the Red Planet may once have been blue.


Article Reprintmars

The Curiosity rover has found water in the soil of Mars. Which is, on the one hand, big news: Water! Right in the soil of the seemingly barren planet! On the other hand, though, it’s news that isn’t terribly surprising: Scientists have long speculated that Mars was once Earth-like in its capacity to host water. And the planet, of course, is already known to host both ice and snow at its poles.

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