Curiosity's watery find

Mars rover finds rocks that show where water once flowed

By Stephen Ornes, 10:17 AM October 18, 2012

Since August, NASA's Curiosity rover has been exploring a giant Martian crater with a mountain in the middle. In late September, scientists announced that if the rover had landed there 3.5 billion years ago, it might have landed with a splash. Curiosity seems to have landed right in the middle of a former streambed.

The moving water would have been “from ankle to hip deep, and maybe moving a few feet a second,” planetary scientist William Dietrich told Science News. Dietrich works with ot...

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