Each side of its base measures some 776 feet, and the sides vary by only 7.9 inches; the pyramid’s stones are placed so accurately that it’s impossible to fit a sheet of paper between them. The sides of the pyramid run with an error of a little more than 4 degrees, almost exactly from north to south and from east to west.
In the 19th century, as archeologists mapped out the pyramids, the wonder induced by these details encouraged a whole new pseudo scientific discipline. “Pyramidology” sought to discover the “Pyramid inch,” a standard unit that allowed the Egyptians to build with such uncanny precision. Standard such as pi, the mass and circumference of the earth, and the distance of earth to sun were suggested. Others proposed the theory that the pyramids were great stone texts, in which details of the entire history of the world had been encoded. Pyramidologists stretched to even greater imaginative lengths to explain how these stone marvels were constructed.