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When Opportunity Calls, The Message Isn’t Always Clear
In an act that proclaimed the continuing importance of the aging spacecraft—looking tired and dusty but proud after weathering no less than five Martian winters—the rover <em>Opportunity</em> beamed home a set of images that has scientists scratching their heads.Scientists examining a Mars image from the 9-year-old rover <em>Opportunity </em>have multiple working hypotheses of what the spherules might be, but no one is yet sold on an explanation.
