Synesthesia

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...

Talking about Grapheme to Colour Synesthesia with Alex from Bite Sci-Zed. Do you see numbers as colours? Leave a comment on the video.

Check Alex's channel at http://www.youtube.com/user/Lexie527