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Mars Exploration Rover Spirit believe it's discovered another rock.


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Mars Exploration Rover Spirit believe it's discovered another rock.
Mars Exploration Rover Spirit believe it's discovered another rock.

Spirit Finds New Rock Affected by Water.

Scientists working with the Mars Exploration Rover Spirit believe it's discovered another rock that was affected by liquid water in the past. Dubbed "Peace", the rock contains more sulfate salt than any other rock Spirit has examined so far. Normally this sulfur is at the surface of the rock, but Peace has this material deep inside too. The scientists have two theories for how these sulfates formed, but both involve large amounts of liquid water.

Centre of Valles Marineris.

The European Space Agency's Mars Express spacecraft took this image of the central region of the Valles Marineris. This 4,000 km (2,500 mile) long gash in the surface of Mars was probably created when the relatively nearby Tharsis bulge rose up from volcanic activity to a height of more than 10 km (6 miles). A similar situation exists here on Earth (on a smaller scale), at the Kenya rift in east Africa.

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