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Continue to ChatMegastructures - A Sign of Larger than Life Aliens? https://amazingstories.com/2019/04/megastructures-a-sign-of-larger-than-life-aliens/
Megastructures - A Sign of Larger than Life Aliens? https://amazingstories.com/2019/04/megastructures-a-sign-of-larger-than-life-aliens/