How the Pyramids Were Built in Egypt

I've been saving this one for a while and just came across it again. The pyramids were built with geopolymers. Mystery solved, here's the evidence.

Are the pyramids made out of concrete, an artificial re-agglomerated limestone? Joseph Davidovits and the Geopolymer Institute crew shows that only few people are able to rapidly and easily produce several tons of pyramid stone blocks.
https://www.geopolymer.org/archaeology/pyramids/