Spirit Marks One Year on Mars

Spirit, the untiring robotic "wonder child" sent by NASA to explore the eerily earthlike fourth planet from the sun, has completed one martian year--that's almost two Earth years--on Mars. Designed to last only 90 martian days (sols), the six-wheeled marvel the size of a golf cart has pursued a steady course of solar-driven geologic fieldwork, bringing back some 70,000 images and a new understanding of Mars as a potential habitat.

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