Photo: Great Pyramid Built Inside Out, French Architect Says

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A spiraling ramp inside the Great Pyramid of Giza allowed builders to hoist the monument's millions of heavy stone blocks, according to a French architect. Jean-Pierre Houdin teamed up with a computer-imaging firm to create the 3-D model seen here to illustrate his theory. But Egyptian authorities say Houdin's requests to test his theory at the actual 4,500-year-old tomb have been denied.

Image from Reuters/HO

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