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good material thanks al4a The fine-grained soil doesn't really match the rocks around it, said Pierre-Yves Meslin of the University of Toulouse in France, who led one of the studies. But it does seem to match the stuff found at sites where other rovers and landers touched down. That means it's probably distributed over much or all of the planet, kicked up and carried far in the fierce dust storms that can shroud the planet in a reddish haze.

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