I think Dave and everyone else working on the Mars rovers deserve a huge pat on the back for this. As far as I can tell, Spirit and Opportunity have completed their mission (proving that Mars once was covered in water), anything else now is icing on the cake. Very, very, very nice icing, that is
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So, to NASA, congratulations on a job well done.
Of course, now the question is, since we've proved that there once was liquid water on Mars, was there life, and is it possible still there today...?