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Submission + - Water Found on Mars (

RCC42 writes: The opportunity rover has found evidence of liquid water once flowing 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 at 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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Water Found on Mars

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The trouble with doing something right the first time is that nobody appreciates how difficult it was.