Jean-Pierre Houdin spent a couple of decades working as an independent architect around Paris. Then, his career took a big turn. Working with his father, Houdin tried to crack an ancient mystery - how were the great pyramids of Egypt built? Throughout the centuries, various theories have been put forth.
Herodotus speculated that some 'machines' were involved. Others thought that mounds serving as ramps played a central role in the construction. And still others have guessed that extraterrestrials were the real builders. Now, using state-of-the-art 3-D software, Houdin has concluded that the bottom portion of the pyramids were built with an external ramp, and the upper portions with internal ramps.
