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 absence of modern-day calculators did not stop ancient cultures from performing extraordinary feats of mathematics. The ancient Greeks kept count with abaci, frames with rods or grooves for moving ...

An Inca quipu (khipu) used for storing data with a system of knots. 15th century CE. Larco Museum, Lima. Credit: Claus Ableiter (CC BY-SA) An Inca quipu (khipu) used for storing data with a system of ...

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, ...

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 ...

The quipu was a series of knotted strings by which the Inca kept their administrative records. Peru. Inca. 1430-1532 AD. Staff Writer When the U.S. Census releases its latest national, state and ...

Researchers have designed a new device that could offer a cheaper and easier-to-manufacture alternative to existing diagnostics for GI dysmotility, inspired by the ancient Incan technology of quipu, ...

SAN ANDRéS DE TUPICOCHA starts every year by swearing in new leaders, like many small towns in Peru. Instead of giving the office-holders a sash or medal it gives them a quipu, a coloured skein of ...