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CryptoPunk
on Oct 12, 2019
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I’m Convinced We Found Evidence of Life on Mars in...
Apparently Dyson spheres can be undetectable with IR telescopes:
https://www.tillett.info/2016/08/03/carnot-efficient-dyson-s...
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https://www.tillett.info/2016/08/03/carnot-efficient-dyson-s...