In another shot to our cosmic ego, scientists have discovered a new superstructure, named Quipu, that stretches 1.39 billion light-years across and contains the equivalent mass of 200 quadrillion ...

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 ...