At the end of their most recent paper reporting these findings, the researchers reflect that it is “ironic, sublime and truly humbling” that this 4,500-year-old limestone is so true to the original that it has misled generations of Egyptologists and geologists and, “because the ancient Egyptians were the original-albeit unknowing-nanotechnologists.”

As if the scientific evidence isn’t enough, Barsoum has pointed out a number of common sense reasons why the pyramids were not likely constructed entirely of chiseled limestone blocks. —Sheila Berninger and Dorilona Rose —The Surprising Truth Behind the Construction of the Great Pyramids (Live Science)