Long before Spanish colonization, the indigenous people of Peru kept track of important dates and numbers, and perhaps even stories, using a mysterious coding system of strings and knots called a ...

The Inca Empire in South America, one of the most powerful pre-Columbian societies, was known for many innovations — such as the architecture of Machu Picchu, an extensive road network, and a system ...

Inca Advances into the Eastern Tropics: The Amazon and Chaco in Perspective / Sonia Alconini -- Rock Shrines, Ceque Lines and Pilgrimage in the Provinces / Jessica Joyce Christie -- Heritage Tourism ...

Inca society kept records by encoding information into knotted cords called khipu. A new analysis of hair woven into these cords suggests this... A lock of hair may have just changed what we know ...