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 ...

To the casual observer, they appear to be little more than multicolored tangles of arm-length strings. But a growing number of experts think "quipus" may hold the secrets of the Inca Empire. The Incas ...

LIMA, Peru — To the casual observer, they appear to be little more than multicolored tangles of arm-length strings. But a growing number of experts believe that “quipus” may hold the secrets of the ...

Long before computers existed, the Inca people collected data and kept records using knotted strings known as quipu. That technology has inspired a new system for assessing gastrointestinal problems, ...