That is certainly interesting as his idea sidesteps some of the problems with the Davidovits theory.

I do find it odd that the Egyptians didn't slop some of this liquid material around, leaving traces of it and that they would use it only at Giza and not elsewhere. I wish his name wasn't Barsoum - a bit to close to literary Barsoom!

Doug what is the history of concrete in Egypt? I understood there was evidence of its use as a fill???