NASA's Mars rover Opportunity is rolling into Victoria Crater, a half-mile wide scar in the surface of Mars. Its goal is a bright band of material that runs along Victoria's walls much like the ring around a bathtub, mission managers said. "We suspect that this bright band of material is the ancient surface of Mars prior to the impact that created Victoria," John Callas, Mars rover project manager, said. "It's composed of three distinct layers that we can see in the imagery."
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