That is actually a very good question. I watch the History channel, and I have seen just about all the documentaries there are on the pyramids. I want to believe that flesh and blood men built them. You have got to remember that mathmatics as a science is not something that was discovered 1000 years ago, Math has been around since long before the Egyptians. Their knowledge of astronomy, mathmatics and architecture were a lot farther advanced than we may have previously thought. So, yes, I am going to say that men built the pyramids.