Pyramid scheme: Archaeologists question claim of ‘huge city’ beneath Egypt’s Giza Plateau
A research team’s astonishing claims that they discovered massive underground structures extending hundreds of feet deep ...
PBS8y
How Steep?
Each side of the Great Pyramid rises at an angle of 51.5 degrees to the top. Not only that, each of the sides are aligned almost exactly with true north, south, east, and west. For a pyramid to ...