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Maps Show Mars Was Once More Like Earth

vrioux writes "NASA scientists have discovered additional evidence that Mars once underwent plate tectonics, slow movement of the planet's crust, like the present-day Earth. A new map of Mars' magnetic field made by the Mars Global Surveyor spacecraft reveals a world whose history was shaped by great crustal plates being pulled apart or smashed together. ."

4 of 223 comments (clear)

  1. probably more common than we think by BushCheney08 · · Score: 5, Insightful

    I wouldn't be surprised to find that the majority of solid planets that we examine undergo the same basic geologic mechanisms. Tectonics, subduction, spreading, etc, are probably far more common in the universe than we think.

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    Be a real patriot: Question authority. Think for yourself. Formulate your own conclusions.
  2. Re:Aliens? by BushCheney08 · · Score: 4, Insightful

    Seeing as how we do not behave exactly like every other animal...

    Please tell me you're being facetious. I'm sure you'll find that no two types of animals behave *exactly* alike. However, a whole lot of them (including us), do exhibit many similar behaviours.

    --
    Be a real patriot: Question authority. Think for yourself. Formulate your own conclusions.
  3. Re:Aliens? by meringuoid · · Score: 4, Insightful
    Seeing as how we do not behave exactly like every other animal, would there be a way that we could have come from Mars? Perhaps Adam and Eve were real and the first couple to come.

    Rubbish. We came from the Pak homeworld.

    In other words, no. We, as in humans, didn't come from Mars. We're definitely mammals, closely related to the other great apes. It's about as plain as you could ask for at every level from DNA right through to gross anatomy.

    It is conceivable that life originated on Mars and spread to Earth in the days of nothing but single-celled organisms, but that's quite another matter.

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    Real Daleks don't climb stairs - they level the building.
  4. Re:Aliens? by m50d · · Score: 4, Insightful
    Seeing as how we do not behave exactly like every other animal, would there be a way that we could have come from Mars?

    We're incredibly similar to every other animal - same basic chemistry, most of our genome the same. We have the same ancestors as every other living thing on this rock. A better (and open) question is whether all life on Earth is descended from (primitive) life that originated on Mars and was carried here by meteorites before Mars became uninhabitable.

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    I am trolling