The Romans had the technology and resources to build pyramids, so why didn’t they? Explore the Great Pyramid through Roman ...

Forget ropes and ramps—what if the secret to the pyramids was sound? We explore the ancient mystery of acoustic levitation and how it may have allowed civilizations to lift and transport stone with ...

This file Aug. 19, 2011 photo shows tourists as they leave the Bent Pyramid at Dahshur, about 25 miles south of Cairo, Egypt. An international heritage research group says scientists will begin ...