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More evidence of water is uncovered on Mars

SHARE More evidence of water is uncovered on Mars

PASADENA, Calif. (AP) — NASA's Spirit rover uncovered more evidence that there was once water on Mars, although not in the quantities its twin Opportunity found traces of halfway around the planet last month, the space agency said Thursday.

Spirit found clues that limited amounts of water altered a volcanic rock, coursing through tiny fissures that crisscross the boulder and cementing together the multiple layers that mask its surface.

The findings were made during a weeklong analysis of the rock in the Gusev Crater region where Spirit landed Jan. 3.