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Mars Contamination Fear Could Divert Curiosity Rover

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Curiosity view of Aeolis Mons, Mars

View from the Mars rover Curiosity at the foot of Aeolis Mons, before the rover starts to climb the mountain.

Credit: NASA

Four years into its travels across Mars, NASA's Curiosity rover faces an un­expected challenge: wending its way safely among dozens of dark streaks that could indicate water seeping from the red planet's hillsides.

From Nature
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