Drill, Baby, Drill! Mars Rover Cuts Into a Rock
Mars Curiosity rover looks for chemical signs of past life.
Mars Curiosity Rover
In this artist's rendering, a "sky crane" lowers the Mars Science Laboratory Curiosity rover onto the surface of Mars. The rover was too large to be cradled in airbags or use conventional landing rockets. (JPL-Caltech/NASA/AP Photo )
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