[b0rsuk]

Even if we successfully build a space elevator and putting stuff on orbit becomes relatively free, we would still need to build a 100% sustainable spaceship. Or a completely game-changing technology like teleportation, and there's no proof such thing is practically possible.

[pixl97]

>we would still need to build a 100% sustainable spaceship

Yet for the purpose of this article, or at least discussion, people are acting like the Earth is.

[jotm]

It seems to me that's an achievable goal... if everyone throws risk aversion/mitigation out of the window.

No rules about nuclear power on ships, no worrying about contamination on other planets, laissez-faire attitude about risks that come with space launches/travel and fully automated control of rockets/spaceships, massive investment in life support systems and AI, etc.