It's really amazing how ancient peoples had come to realization with the universe around them, before any real technology. In a sense, they almost know more than we do today, even with technology.
Actually, no one can build a pyramid like the egyptians supposively did today. We simply don't have the machinery and manpower required for such a task, and neither did the Ancient Egyptians. We can't even rebuild Stonehenge, and Stonehenge is puny compared to the Pyramids.
The pyramids of Giza were built on a sacred geometrical equasion called Phi, or the golden ratio. The pyramids were arranged to align with the 3 stars in Orions belt and built on a 52 degree angle.
http://jwilson.coe.uga.edu/emt669/Student.Folders/Frietag.Mark/Homepage/Goldenratio/goldenratio.html
Now Phi has been used to broadcast Mozart's 40th Symphony in 8.7GHz (1.618 frequency) microwaves to 4.7C (more than four and a half times the speed of light)
http://www.akasha.de/~aton/SuperPHI.html
Read the captions beside each picture. Not that much reading, but the mathematics that go along with the actual sites reveal some pretty interesting things.
http://mars-earth.com/11face.htm