Tom McCollom is a geochemist at the University of Colorado in Boulder.
NPR: Mars Rover Marks Second Anniversary of Landing
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Tom McCollom says scientists have the rovers to thank for that.
NPR: Mars Rover Marks Second Anniversary of Landing
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Mr. McCOLLOM: We now have this tremendous data set that's being returned by the Mars rover that--I mean, we wouldn't have any debates if that data wasn't there.
NPR: Mars Rover Marks Second Anniversary of Landing