text: New signs of water on the Red Planet A cracked rock called Escher is helping NASA scientists reconstruct the history of water on Mars. They say that the crater currently being explored by the Opportunity rover may have been shaped by a second 
inputs: New signs of water on the Red Planet A cracked rock called Escher is helping NASA scientists reconstruct the history of water on Mars. They say that the crater currently being explored by the Opportunity rover may have been shaped by a second 