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Home In this illustration, NASA’s Mars 2020 rover uses its drill to core a rock sample on Mars. (NASA/JPL-Caltech) In this illustration, NASA's Mars 2020 rover uses its drill to core a rock sample on Mars. (NASA/JPL-Caltech)

In this illustration, NASA’s Mars 2020 rover uses its drill to core a rock sample on Mars. (NASA/JPL-Caltech)

In this illustration, NASA's Mars 2020 rover uses its drill to core a rock sample on Mars. (NASA/JPL-Caltech)

In this illustration, NASA’s Mars 2020 rover uses its drill to core a rock sample on Mars. (NASA/JPL-Caltech)