Spirit Hints at Past Water, Opportunity Hits Rock Bottom

Those two Rovers are at it again. No, not that. They are finding more and more evident of a history of liquid water on Mars. Fascinating stuff.

“I would say that this is the most powerful evidence [of water] in the rocks at Gusev Crater,” said Steven Squyres, the rovers’ principal investigator from Cornell University. “We had evidence…that a little bit of water percolated through the plains there.”