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by inglor_cz 1062 days ago
Not all metal. Buried gold retrieved from ancient graves looks very "fresh".
2 comments
MichaelZuo 1062 days ago
After ten million years even a large gold ingot would entirely be subsumed by the surrounding matter. Assuming a 10 nanometer/year erosion.
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jiggawatts 1062 days ago
Also most of the noble metals would remain pristine: platinum, iridium, etc…
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