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Worldbuilding
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johninjapan's user avatar
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johninjapan
  • Member for 7 years, 3 months
  • Last seen more than 7 years ago
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33
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33
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33
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Top posts
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How to wrap the Moon in plastic to make her a giant, supported by the atmospheric pressure, greenhouse
Sep 3, 2017
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Asteroid Mining as an Economy?
Sep 3, 2017
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How much stuff could we get into Earth orbit for the start-up cost of initiating asteroid mining?
Sep 3, 2017