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From Popular Science: A video recently released by NASA’s Jet Propulsion Laboratory looks at the chemical tools Curiosity will use to search for signs that Mars could have once sustained life. Curiosity sets itself apart from other rovers like Spirit and Opportunity by having the ability to act as a robot “geochemist,” the video explains. Piloted by a team back on Earth, scientists will steer Curiosity into a nearby crater, then search and test layers for evidence that life could have evolved at one point in the planet’s history.

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