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10
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Is this atmospheric composition breathable, and what would it look like?
planets
space-colonization
atmosphere
habitability
asked Jun 5, 2017 at 18:43
worldbuilding.stackexchange.com
6
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Cities of a civilization of sentients capable of natural flight?
aliens
cities
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sapience
asked Jun 29, 2017 at 1:49
worldbuilding.stackexchange.com
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