Great Pyramid Mystery Solved? | National Geographic

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Shared October 31, 2008

How were the blocks raised to the top of the 489ft Great Pyramid? An architect develops a theory about a snaking internal ramp that's been hidden inside the pyramid for 4500 years.
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#NationalGeographic #Pyramids #Architecture

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Great Pyramid Mystery Solved? | National Geographic
https://youtu.be/lasCXujNPfs

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