History: Science or Fiction? Alchemy of the Pyramids. Film 4 of 24

The mysteries of ancient Egypt have been at the center of scientists' attention for several centuries. Among the many cultural architectural monuments left by the lost civilization, the most famous certainly are the three giant pyramids located on the stone plateau of Giza, near Cairo. Who, when and why built these cyclopean tetrahedra? It would seem that academic science has long answered these questions. Perhaps the only unresolved problem is the answer to the question of how they were built. Numerous technical solutions are offered in a variety of ways, but each of them contains many weaknesses, and all attempts by researchers to test the theory in practice have ended unsuccessfully.
Meanwhile, in the latter half of the 20th century, chemical engineers made a discovery, backed by independent examinations of samples of building stone that provided a clue to the technology used to construct pyramids. The mystery of the ancient pyramids has been solved. However, the scientific world answered with complete silence. Egyptologists did not seem to take notice of the discovery, and they still do not want to notice it.