Science of Machu Picchu (Science of History) (The Science of History)

Have you ever heard of Machu Picchu? It's an ancient citadel high in the mountains of Peru. Science played a big role in the building of Machu Picchu and the daily life of the Inca people who lived there. Find out the science behind Machu Picchu. Discover how modern technology is being used to uncover more mysteries of this ancient place.