chilling facts about the Pyramids of Giza

Some of the knowledge lost when the library of alexandria was lost wasnt rediscovered until the last couple of hundred years. The majority of the great discoveries from the 1400's on was written about there. Recently found manuscripts talk about books there discussing the earth being round, circling the sun instead of the other way around. Archimedes understanding of mathmatics was nearly as far along as mathmatics in the 1950's. All of this and more over a thousand years before the men credited with the discoveries were born. Maybe the Egyptians did know what they were doing