Martian "Blueberries"

flowed on Mars has come from analyses of the the rocks and soils at Meridiani Planum, the landing site of the rover Opportunity.

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flowed on Mars has come from analyses of the the rocks and soils at Meridiani Planum, the landing site of the rover Opportunity. Researchers writing in the current issue of Science describe, among other things, millimeter-size granules called "blueberries" (above) that contain high concentrations of hematite, an iron ore that forms in the presence of water.

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