The Incas had a system of accounting that relied on the quipu. Cords of various colours were attached to a main cord with knots. The number and position of knots as well as the colour of each cord ...

From the quipu to the conquistadors, writer Rob Rath talks about cool stories we couldn't quite squeeze into the series, as ...

Legal cases against ex-President Fujimori and the ministers responsible for the sterilisation programme have been repeatedly delayed and shelved. The Quipu project was developed as a way for those ...

There's a lot that we don't know for sure about the Inca Empire, because we have conflicting accounts among Spanish ...

While much of the world used stone tablets or other media that didn’t survive the centuries, the Incas used something called quipu which encoded numeric data in strings using knots. Now the ...

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 ...