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Description: Were the Egyptian Pyramids constructed of carved limestone blocks from nearby quarries, or from cast-in-place concrete? A decades-old controversy was reignited recently with publication of a new article in the December 2006 issue of the Journal of the American Ceramic Society. In it, material scientists claim new chemical evidence of concrete in the higher levels of the pyramids. Opponents, including Egyptologists, continue to dispute the evidence, and point out that the diverse shapes of the stones show that molds were not used. The sources listed here—articles, conference papers, books, and web sites—represent authors on each side of the argument. Abstracts are included where available.
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