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RE: The main threat on the way to Mars – space radiation
I think the main threat to Mars is Human's if we are going to go up there, the human race for 1 is going to ruin the entire planet. First it will populate it, and make it all nice, and after that they will suck the living life out of it again. We ave the technology to get up there. Unfortunately we lack intelligence on a social level to sustain growth.