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Are Pyramids Made Out of Concrete?

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Link Title: Are Pyramids Made Out of Concrete? Open in a new window
Link URL: http://www.geopolymer.org/science_archaeology/pyramids_egypt/index.html
Link Details: Research by Joseph Davidovits suggests that pyramids and temples were constructed using agglomerated limestone, rather than quarries, and hoisted blocks of natural limestone.
Category: Top : Science : Social_Sciences : Archaeology : Alternative : Egypt : Pyramids
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Are Pyramids Made Out of Concrete?