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A comment on Would it be possible to detect an industrial civilization in geological record?. Parent comment

Re:Would it be possible to detect an industrial civilization... by jula432vdf on Tuesday September 29, 2020 @12:24AM (#24624138)
As far as we know, quasars could be fully artificial, and around them you could find some of our future friends.

and those things would be pretty outdated - ancient - technology by time we spotted them.

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