| http://www.w3.org/ns/prov#value | - raised off-Earth could later adapt to Earth gravity. (Any space structure intended for really long-term habitation will need to be spun, but probably at a good deal less than 1 g.) It is fine to say that the children of thriving space communities might not even wish to visit Earth, but there is a bootstrapping problem, because the first space communities will be more nearly outposts.
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