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Mars NASA Space Science

NASA's Gypsum Find Clear Evidence There Was Water On Mars 162

First time accepted submitter RCC42 writes "The Opportunity rover has found evidence that liquid water once flowed on Mars, through the discovery of gypsum — a mineral that can only be formed in the presence of water. Though other evidence in the past has suggested highly acidic water on Mars, this is the first evidence for water with a pH suitable for life as we know it."
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NASA's Gypsum Find Clear Evidence There Was Water On Mars

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The unfacts, did we have them, are too imprecisely few to warrant our certitude.

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