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A comment on If We Weren’t the First Industrial Civilization on Earth, Would We Ever Know?. Parent comment

Re:If We Weren’t the First Industrial Civilization on Earth,... by gmantg on Monday July 20, 2020 @01:36PM (#23900068)
The "legend" is that every civilization gets buried under a thick layer of earth, so we'd have to dig real deep, hundreds of kilometers deep, to find anything.
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