Origins of Pi (Score 1)

The earliest calculations of Pi were not done by the Greeks. The Great Pyramid at Giza is traditionally dated at 3500 BC. The ratio of it's circumference to it's height is exactly 2pi to 1. In the Teotihuacan, outside of Mexico city, the temple of the Sun has a circumference to height ratio of 4pi to one. And in both places the only hard scientific data available places their dates at around 10,500 BC. As it became fashionable to analyze the mathematical and astronomical significance of theses ancient buildings(late 80's), scientists began to discover insane mathematical/astronomical puzzles built in to their structures. It's pretty fascinating stuff.