The base of the Great Pyramid is a square with each side measuring 230 m (756 ft) and covering an area of 5.3 hectares (13 acres). How much is that? Imagine a football field. Nearly 10 football fields ...

There is still plenty to learn about the pyramids of Egypt. For instance, it would be nice to know what is in the massive void sealed inside the Great Pyramid of Giza 4,500 years ago, or precisely how ...