who really knows??!
All I know is that archaeologist says that they build these Huge pyramids with copper tools, with out the invention of wheel while importing thousands of trees from mediterranean countries.. pretty stupid "theory" IMO.
According to ancient stories the Pyramids appearance were in polished limestone with the top covered in GOLD(eye that sees all), and you could literally slide if you tried to climb the pyramid. My friend who is an architect says he can not believe HOW the build those huge monuments without modern tools!!

"Twenty years were spent in erecting the pyramid itself: of this, which is square, each face is eight plethra, and the height is the same; it is composed of polished stones, and jointed with the greatest exactness; none of the stones are less than thirty feet." -Heroditus 484 BC
It's original polished limestone outer casing remains largely intact!!Heroditus 484 B.C (called Father of history) said when he visited the Pyramids they were already Ancient!!
History is full of mysteries and I like that Getbiggers are interested in it!!i.e Epic of Gilgamesh.. the Giants!!
Holding full grown lions as kittens!!

good calves delevopment, Erik Fankhauser would be proud.