We spread, we multiply, we consume and then we spread a little more. It's inevitable we'll some day colonize another planet and take what we can of humanity along with us. The question is, given the opportunity, could you conceive of leaving our blessed planet for another? Let's say you could never go back. Perhaps your family and friends are left behind on this old rock. Do you feel any meaningful attachment to our planet or would the prospect of change and adventure write your signature on the papers for you?