How were the pyramids of egypt built?
The most widely accepted theory is that the ancient Egyptians built the pyramids using a combination of manual labor and simple machines. The Egyptians used a system of ramps and sleds to pull up and move the large stones which make up the pyramids. They also used a type of mortar to hold the stones together. The most impressive of the pyramids, the Great Pyramid at Giza, is thought to have been built using an internal ramp system that was slowly built up as the pyramid grew in height.