I’m not saying those are the exact techniques that were used to build the pyramids, but they demonstrate that massive stones can be easily lifted and accurately placed using only “primitive” resources and leverage.
A couple years ago my chemistry teacher told my class that the Egyptians had really advanced technology (technology even more advanced than our own) thousands of years ago but it all got lost because they started a nuclear war
Edit: she told us that the evidence was that there were smartphone paintings
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