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dharmab
on Dec 17, 2023
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Possible to detect an industrial civilization in g...
Over geologic timescales, almost all rocks on earth are pushed down far enough that they melt, mix, and are churned back up as new rock.
jl6
on Dec 17, 2023
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There’s still a lot of room to hide in that “almost”. Continental shields in Canada and Australia haven’t been recycled into the deep Earth and we can still find geological features there that are billions of years old.
Jensson
on Dec 17, 2023
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We still find fossils from hundreds of millions of years ago, and giant constructions are much better at surviving than skeletons.
hef19898
on Dec 17, 2023
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Only that so far back, we know Earth was not really inhabitable.
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