1. Pyramids Of Egypt
... research may force even Egyptologists to revise their thinking about how the pyramids were built. Davidovits suggests that the Egyptians actually used man-made stone that was cast at the pyramid site, where it was needed. The process, he says involved pouring slurry of crushed limestone and ... showed that the quarried limestone consisted almost entirely of lightly packed calcite crystals that gave it a uniform density. In contrast, the casting stone was less dense and contained numerous air bubbles. Consequently if the casting stones were natural limestone, and did not match that of th...
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- Approx Pages: 15
- Grade Level: High School