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Waterpower may have given a big lift to builders of Egypt’s oldest known pyramid, the nearly 4,700-year-old Step Pyramid of Djoser at Saqqara. Ancient architects built a hydraulic system for hoisting ...

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How the great pyramids of Egypt were built has long been a hotly debated open question, given the sheer size and weight of the limestone blocks used for the construction. Numerous speculative (and ...