Has researcher Randal Carlson revealed Egypt's oldest secret? Carlson allegedly knows the true purpose of the Giza pyramids - and we can reveal: According to Carlson, the monumental structures were not burial chambers! But why then did the Egyptians go to such lengths to place three geometrically perfect structures in the middle of the desert? And what drove people from a certain era of the world age onwards to put enormous effort into the construction of large stone buildings?