>Digging stuff out of the deep earth is easier than setting up a colony on Mars We're already doing that and regulations are the limiting factor, we don't want to dig out the mountains or turn them into dust in the atmosphere. >do you understand the complexity Yes and the muskman has already created the infrastructure for it while making a profit doing it. The first years or decades will be exploration while shipping millions of tons of materials over there including robots. The first resource priority will be turning energy into fuel. I tend to think the moon is a better option but I didn't make a profitable interplanetary infrastructure so I can't test that theory.

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