The Inca citadel of Machu Picchu was occupied from around 1420-1530 AD, several decades earlier than previously thought, according to a new study.
원문출처 : https://www.cnn.com/travel/article/machu-picchu-peru-study-scli-intl-scn/index.html
원문출처 : https://www.cnn.com/travel/article/machu-picchu-peru-study-scli-intl-scn/index.html