The pale rock in the upper center of this image, about the size of a human forearm, includes a target called "Esperance," which was inspected by NASA's Mars Exploration Rover Opportunity. This image is a composite of three exposures taken by Opportunity's panoramic camera during the 3,262nd Martian day, or sol, of the rover's work on Mars (March 28, 2013). CREDIT: NASA/JPL-Caltech/Cornell/Arizona State Univ. View full size image The venerable Mars rover Opportunity, the older and smaller cousin of Curiosity, has discovered another water-weathered rock hinting that the Red Planet could have supported life in its ancient past, NASA officials said. In its last days exploring "Cape...
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