Ancient Technology in Peru and Bolivia

David Hatcher Childress, popular Lost Cities author and star of the History Channel's long-running show Ancient Aliens, takes us to the mysterious ruins in the mountains of Peru and Bolivia in search of ancient technology and the secrets of megalith building. In his new book, packed with photos and diagrams, Childress examines the amazing stone cutting at Puma Punku near the ancient ruins of Tiwanaku near Lake Titicaca in Bolivia. He looks at whether the so-called "Inca walls"–found in Cuzco and…