[mullingitover]

I get the sense we're going to need to do some heavy genetic engineering before we're able to survive long-term on other planets. Probably more than anyone from this generation will be comfortable with. This of course will raise the question, have we really saved ourselves from extinction if what we save isn't exactly human?

[pcrh]

Given how far away other earth-like planets are likely to be, the more immediate challenge is long-term survival off earth, either in a spacecraft or on mars.

Once we learn how to survive "on our own" then one could envisage making the journey to some Earth II.