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National Geographic: Egypt--Great Pyramid of Khufu at Giza - 0 views

www.nationalgeographic.com/...khufu.html 11 ancient history giza khufu national geographic
shared by Nathan Kench on 22 May 08 - Cached
  • The largest pyramid ever built, it incorporates about 2.3 million stone blocks, weighing an average of 2.5 to 15 tons each. It is estimated that the workers would have had to set a block every two and a half minutes.
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