The Inca string code that reveals Peru's climate history
Five centuries ago, the Incas ruled the western half of South America with the help of a unique form of writing based on colored and knotted cords. These strings, called khipus, recorded major events, tracked economic matters, and even encoded biographies and poetry, according to the Spanish chroniclers who witnessed their use.
Five centuries ago, the Incas ruled the western half of South America with the help of a unique form of writing based on colored and knotted cords. These strings, called khipus, recorded major events, tracked economic matters, and even encoded biographies and poetry, according to the Spanish chroniclers who witnessed their use.
