The secret of the great pyramid

The ancient story chronicles, step-by-step, how a nation of farmers only recently emerged from the Stone Age could construct one of the Seven Wonders of the Ancient World. To execute something as complex and massive as the Great Pyramid, Egypt needed architects, mathematicians, boat builders, stone masons, and metallurgists. It took twenty years to build the Great Pyramid. By the time its capstone was laid in 2560 B.C., the innovations born of the building quest had transformed agrarian Egypt into the world's most modern, most powerful nation.