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Thread: Mars Express Sees Water's History on the Red Planet

  1. #1
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    Post Mars Express Sees Water's History on the Red Planet

    Most of humanity's Mars-bound fleet of spacecraft is searching the Red Planet for evidence of its watery past. New evidence gathered by ESA's Mars Express spacecraft is helping scientists fine tune their theories. A radar instrument on the spacecraft has turned up water ice in Mars' upper layers; a mineral mapping instrument has discovered chemicals formed in a wet environment; and its powerful camera has picked out obvious features on the surface of Mars formed by running water. Here's a breakdown of what Mars Express has found so far.

    Read the full blog entry

  2. #2
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    A billion year glacier! I don't think there's anything to match that on Earth.

  3. #3
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    No, there isn't. The Antarctica became ice-covered some 15 million years ago and the ice is constantly being renewed. Oldest ice is "only" hundreds of thousands of years old.

  4. #4
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    I think I erased my reply. Thanks, Kullat, I thought Ant. was recent.

  5. #5
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    I think it will take time and lots of missions to really understand the history of Mars. The current and recent missions have discovered a lot of things, but the geology is complex enough that it will take time to sort it out.

    Glaciers are one example -- when they formed, how they formed, where they formed, how the changes in Mars' axial tilt impacted them, where the ice went.

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