the pyramids are made of concrete

[slam]

http://www.livescience.com/history/070518_bts_barsoum_pyramids.html

i remember seeing a guy talking about this theory years and years ago on one of the numerous egyptian shows on the history channel. they laughed at him on the show.

[matty]

The History channel actually had a show about this a few months ago. They had that dude on, and he was like, "Everybody laughed at me!"