Others have considered this, but moving forward from the present day. In particular, Danny Hillis [https://en.wikipedia.org/wiki/Danny_Hillis] and his work, funded by Jeff Bezos [https://en.wikipedia.org/wiki/Jeff_Bezos] called "The Clock of the Long Now" - https://longnow.org/clock [https://en.wikipedia.org/wiki/Clock_of_the_Long_Now]. The clock is designed to simply tell time for 10,000 years, as time may still be relevant at that future horizon. The problem with a message via pyramids or any other form factor would be its relevance to that future. If one considered the options for preserving a message for the far future, Carl Sagan's [https://en.wikipedia.org/wiki/Carl_Sagan] "golden record" [https://en.wikipedia.org/wiki/Voyager_Golden_Record] on Voyager 1 [https://en.wikipedia.org/wiki/Voyager_1] and Voyager 2 [https://en.wikipedia.org/wiki/Voyager_2] offer a potentially greater solution to preserve our identity and message in space vs. here on Earth.
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