When ancient architects completed construction on the Great Pyramid at Giza, they left behind the greatest riddle of the engineering worldhow did builders lift limestone blocks weighing an average of two and a half tons 480 feet up onto the top of the Pyramid? For centuries, adventurers and Egyptologists have crawled through every passageway and chamber of the Pyramid, measuring and collecting data in an attempt to determine how it was built.
For the first time, a revolutionary theory argues that the answer may be inside the Pyramid. National Geographic follows renowned experts as they find surprising evidence to support this intriguing new idea.
Not available for shipment outside of the U.S.
This offer expires 7/31/14 at 11:59 p.m. PT and can be modified or canceled at any time. Offer excludes globes, map gifts, puzzle gifts, digital products, framed maps, mounted maps, magazines, Genographic Kits, Road Less Traveled merchandise, CafePress merchandise, 10th Edition of the National Geographic Atlas of the World, Around the World in 125 Years - 3-Volume Collector's Edition Book from TASCHEN, Platinum Atlases, and Weekend Photo Workshops. Discount will be applied at checkout. Cannot be combined with other offers; not valid on previous orders. Applicable for online orders only. Prices not valid in the National Geographic UK Online Store or Road Less Traveled.