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

Posted by timothy on from the plaster-of-mars-would-be-really-expensive dept.

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."

1 of 162 comments (clear)

  1. Clarification on Khorasan by astropirate · · Score: 5, Informative

    "Mostly Persians, with roots in Khorasan - writing in Arabic."
    "Needless to say, Iranian civilization ain't what it used to be."

    I just have to clarify that Khorasan is modern day Afghanistan - It was part it was part of Persia, but it isn't Iran. Its a common misconception that people think Persia = Iran. In fact, Persia included (at a time) a lot, of not all of, the ---istan countries. "istan" is the the Persian suffix meaning land. Analogous to Scotland, Ireland.

    My two cents of knowledge.. free for you!