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Egyptian pyramids were built using an incredibly clever machine, new research suggests

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Study led by Xavier Landreau of France ’s CEA Paleotechnic Institute suggests that the Step Pyramid of Djoser was built with the help of a hydraulic lift system.

The study suggests that water was enabled to flow into two shafts, located in the pyramid itself, which were used to help raise and lower a float used to carry the heavy stone building blocks.