Caral: Ancient Peru city reveals 5,000-year-old 'writing'

Archeologists in Peru have found a "quipu" on the site of the oldest city in the Americas, indicating the device, a sophisticated arrangement of knots and strings used to convey detailed information, was in use thousands of years earlier than previously believed. Previously the oldest known quipus, often associated with the Incas whose vast South American empire was conquered by the Spanish in the 16th century, dated from about 650 AD.



Continue reading at:
www.gogeometry.com/Quipu_B.htm