Point about Points

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

Part 1: http://youtu.be/JmyLeESQWGw
An extra bit after this: http://youtu.be/c6NRQbDBKfY

This video features Simon Pampena, Australia's numeracy ambassador.

Ilustration by Pete McPartlan