Did Usain Bolt REALLY run 100m in 9.63 seconds?

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...

Usain Bolt won gold in the 100m sprint at the London Olympics, clocking 9.63 seconds... but Albert Einstein has something to say about all this?

Featuring Tony Padilla - http://twitter.com/DrTonyPadilla