Professor Michel Barsoum of Drexel University, Philadelphia, proposed that the limestone blocks used to build the pyramids of Giza are made of concrete and therefore not natural limestone. A new website where there is an interactive …
Professor Michel Barsoum of Drexel University, Philadelphia, proposed that the limestone blocks used to build the pyramids of Giza are made of concrete and therefore not natural limestone. A new website where there is an interactive …