Great Pyramid

S2 E2: The Great Pyramid at Giza is the last of the Seven Wonders of the Ancient World still in existence. It's as tall as a 50-story building, has stood for 4,500 years, and for centuries, has been a puzzle to archaeologists, who still do not really know how it was built. But today, two new developments might just solve this great mystery: the remarkable discovery of a diary written by one of the men involved in the pyramid's construction, and radical new theories from an engineer who's bringing fresh insights to this ancient riddle.