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The Pyramid of... Benben?
(lemmy.world)
Just so you know, absolutely none of that is true.
https://en.wikipedia.org/wiki/Pyramidion_of_Amenemhat_III
I don't know if the person who posted that is sincere or not, but plenty of people sincerely believe this sort of thing when it is posted on Facebook.
I too heard about this from TWiV. I was very grateful to have finished every back episode of Twitter just before pandemic hit. I felt I was actually prepared for things with the most reliable source on virology available.