[nradov]

It's kind of a moot issue anyway. I hope that a few human explorers will visit the Moon and Mars in the coming decades (and there will be no shortage of volunteers), but the notion of sending settlers there in our lifetimes is a total fantasy. Even if orbital launch costs come way down, the cost of protecting settlers (i.e. at least several dozen permanent inhabitants) from radiation exposure and toxic dust will be so high that no government or corporation could afford it.