Subject: Re: Richard Feynman explains why Mars a one way trip
If we don't have some sci-fi tech like warp drive, our species will be doomed. Again, I can't predict future technology. We may very well have a way to move a lot of people vast distances in a relatively short time. We would have to find a suitable planet (class M, if you're into Star Trek). And then hope that its biology is somewhat compatible with ours, and preferably we wouldn't be displacing some native sentient species (though that isn't a technical problem, just an ethical one).

Yep.
And we might as well get started with things now.