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I think the point was more about a one-way trip for a single person. I'd agree that it's not a one-way trip for humanity, though. Once some of us get there (e.

I think the point was more about a one-way trip for a single person. I'd agree that it's not a one-way trip for humanity, though. Once some of us get there (e.g., progeny of the original crew), eventually some of us could get back to Earth too (at some later date). Assuming Earth isn't destroyed by that point...

hnriot 13y ago
Probably by the time the progeny get back to Earth the current species will have self-annihilated and the earth would have returned to a more peaceful place, the atmosphere recovered, the vegetation replacing the asphalt and the oceans clean and pure. A few thousands years peace is exactly what the Earth needs.