How Did Egyptians Move Massive Stones

One theory suggests that water was used to move massive stones across the desert. What say you ?

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https://www.livescience.com/45285-how-egyptians-moved-pyramid-stones.html

I never doubted the ingenuity of people but how those mega structures were built and how massive stones were moved and placed boggles my mind. There is a chunk of ancient knowledge that has been lost to us for sure.