The pyramids at Giza are usually described as the ultimate building project, millions of blocks stacked skyward by sheer human effort. A growing fringe of researchers and online theorists is now ...

The Great Pyramid of Giza was built about 4,500 years ago, and at 481 feet high it was the tallest structure on earth for over four millenia.The Great Pyramid is 756 feet long on each of its three ...