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I was researching the alien races of H.P. Lovecraft when I came across this passage:
For those unaware, The Great Race of Yith are so named because they've mastered time travel as a means of living forever. This means the Yith who inscribes a plate is intellectually and culturally the same as any Yith who reads that plate eons later; a guarantee that our Longtime nuclear waste warning messages unfortunately lack.
My question is, assuming the Yith can find their plates again, would their way of preserving information be viable in practice? And if not, what would a more efficient, lower-maintenance way of storing information for the ages?