NASA's Spirit rover was declared cured Friday after repair of a problem with its computer's flash memory system that stalled the wheeled robot for two weeks and threatened its mission.
On Sunday, it drilled its first tiny hole in a rock on the surface of Mars, using a tool with small, diamond-shaped heads to cut 2.7 millimeters deep into a small area of a sharply angled rock dubbed Adirondack. The information gathered could give scientists clues to Mars' geologic past.
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