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Man may never set foot on the red planet known as Mars. Steven Squyres understood that a geologist was exactly what space exploration needed and set out to convince NASA to send a robotic geologist to Mars. In 2003, after eight years, he and his team sent two little rovers, Spirit and Opportunity, off on an adventure that was expected to last, at best, for three months. Nine years later Opportunity is still travelling across the surface sending photos back to earth.