Resumen de Immutable laws of friction: preparing and fitting stone blocks into the Great Pyramid of Giza
How did the pyramid builders prepare and fit large stone blocks so that they were horizontal, orthogonal and flattened to within one hundredth of an inch? The author's experiments suggest that the surfaces were prepared using basic instruments made of rods and string, while to move the blocks the immutable laws of friction were mitigated by lubricating with mud and gypsum.
