In detective stories, as the plot thickens, an unexpected clue often delivers more questions than answers. In this case, the scene is a mountain on Mars. The clue: the chemical compound silica. Lots ...
A mineral-scouting camera designed at ASU pointed scientists toward an ancient Martian hydrothermal system like those in Yellowstone National Park. TEMPE, Ariz. – Deposits of nearly pure silica ...
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