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