Water on Mars? Flood of Data, Trickle of Answers: "Spheres remain a mystery
No more information was provided yesterday on spherical grains in the soil and rock of Mars that have puzzled geologists since early February.
The spherules, as they are called, might have formed in the presence of water, but they could also be the result of a volcanic eruption or meteor impact. This week a couple of spheres were sliced in half and photographed, but they've not been fully analyzed. "
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