Elon Musk says we need to put a million people on Mars to ensure the human race’s survival. A million people are needed to make a civilization self-sufficient. > ‘Even at a million, you’re really assuming an incredible amount of productivity per person, because you would need to recreate the entire industrial base on Mars,’ [Musk] said. ‘You would... - http://mitchwagner.tumblr.com/post...