Giza Pyramids Make You Wonder. Or Do They?

So, the academics, the scholars, the guides (who are trained scholars) will tell you these magnificent structures were built by hand by hundreds of thousands of "free" men and without the use of the wheel, 2500 to 3500 years ago. But having now explored inside four of them, and witnessed the stonework as an old construction vet, I call BS on that. There had to be some kind of knowledge that was either handed to the Egyptians be it from an alien source or something they developed on their own and is now lost with the ages.