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> It would be so much easier just to create the ideal environment in a large, rotating cylinder instead of having adjust a planet's environment to our needs.

Yea but people want to go outside.

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Artificial outside? If the ship, for lack of a better term, were big enough its conceivable that you could have a larger open area with grass and trees which would feel much like a park.

Could even paint the roof blue.

I’m open to it, but I suspect it would be difficult to figure out all the things we’d miss even on a biological level. You don’t think people would read about planets and realize what they’re missing? I think they would curse their ancestors for ever leaving. This feeling of leaving some paradise and forgetting what we’ve even lost is a core theme of genesis, it’s as human as anything in civilization, and it’s only going to get stronger if we explicitly abandon where we came from (I mean this metaphorically, I imagine we’d be happy on earthlike planets, even if we do miss earth’s sun or whatever at first).

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