Dating machu picchu
Although known locally, it was not known to the Spanish during the colonial period and remained unknown to the outside world until American historian Hiram Bingham brought it to international attention in 1911.
Machu Picchu was built in the classical Inca style, with polished dry-stone walls.
above the Sacred Valley, which is 80 kilometres (50 mi) northwest of Cuzco and through which the Urubamba River flows.
Most archaeologists believe that Machu Picchu was constructed as an estate for the Inca emperor Pachacuti (1438–1472).
Over the centuries, the surrounding jungle overgrew the site, and few outside the immediate area knew of its existence.
The site may have been discovered and plundered in 1867 by a German businessman, Augusto Berns.
Because of the large amount of rainfall at Machu Picchu, it was found that irrigation was not needed for the terraces.
Most animal bones found were from llamas and alpacas.
These animals naturally live in altitudes of 14000 ft above sea level rather than the mere 8000 ft Machu Picchu rests on.
Studies show that according to their skeletal remains, most people who lived there were immigrants from diverse backgrounds.
They lacked the chemical markers and osteological markers they would have if they had been living there their whole lives.