Bringing Mars back to Earth

But we have samples of Mars here already. I remember one scientist saying that some piece of rock had come from Mars, when he was challenged on his statement he retorted "If it didn't came from Mars then where else could it have come from?"
No I don’t think that bringing Mars back to Earth is a problem, my comment was the end product of a long and convoluted thought process that I’m to lazy to put down in print.
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