The greatest mystery of the Pyramids is who came up with all this unreferenced material that gets repeated in every single source. Like the 2.3 million blocks. Really, 2.3 million blocks? How do we KNOW it's all blocks and not a form filled with sand and rubble? Because that would have made way more sense.

Barbara: We know it is made from blocks because there are passages, some very small, some large enough to walk through, that run through the pyramids. That, remote sensing and some basic arithmetic. Lots of ancient constructions were rubble filled, like the pyramids at Tikal, Guatemala, for example. But Giza, nope - blocks excavated from the nearby quarries.

Me: I don't think any of that can do without a proper reference.

Barbara: Any decent library has many references. You can start with The “Djedi” Robot Exploration of the Southern Shaft of the Queen's Chamber in the Great Pyramid of Giza, Egypt
Author: Grieve, Ron; Ng, TC; ...
Journal of Field Robotics 30 (3) 2013-05 p323

or Building the Great Pyramid: Probable Construction Methods Employed at Giza
by Edwards, James Frederick
Technology and Culture, ISSN 0040-165X, 05/2003, Volume 44, Issue 2, pp. 340 - 354

Me: Cool thanks.