Mars' Mount Sharp: Curiosity rover offers clues to mystery

December 9, 2014 6:39 PM

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CAPE CANAVERAL, Fla. (AP) -- NASA's Curiosity rover is helping scientists close in on a Martian mystery: Why does a mountain jut out of a barren crater?

Scientists said Monday that rock images indicate that 3-mile-high Mount Sharp may have formed in a big lake bed over a million or even tens of millions of years. Deposits of sediment seem to have shaped the mountain.

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