Good point! Let's assume (for the sake of argument) that you could NOT return.

I think that going back would be so rewarding that it would have to be the choice I would make. Imagine the difference it could make if you taught people something as simple as washing their hands before eating. I haven't been able to teach my 13 yr. old son that lesson yet, but anyway...

I don't deny that I would love to visit other planets/colonies in the future (if we don't blow ourselves up before we get there of course) though.