The science of building an Egyptian Pyramid.

[atinymonkey]

The use of rollers isn't in dispute. It's got quite good evidence for it. However, even with rollers you cannot move a 8 tones of solid rock up a 45 degree angle. Hence the established theory of pushing sand up around the pyramid during construction to make the base effectively at ground level. Of course, it's worth remembering the use of rollers, pivots and fulcrums that the hieroglyphs and physical evidence point to. It's make's the whole thing less mysterious and open to unsubstantiated theory.