This combination of images made by NASA's Curiosity rover shows the rim of the Gale Crater on June 7 and 10, 2018 during a major dust storm. The Opportunity rover, which is inside the crater, has fallen silent as the storm blots out the sun. On Tuesday, June 12, 2018, flight controllers tried to contact Opportunity, but the rover did not respond. The storm has been growing since the end of May and now covers one-quarter of the planet. (NASA/JPL-Caltech/MSSS via AP)
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