How big is a billion? - Numberphile
We discuss millions, billions, trillions and centillions is this film about the long and short scales. We also touch on quadrillions, sextillions, milliards, billiards and the Greek myriad.
Featuring Dr James Grime and Dr Tony Padilla. Moe about them at http://www.numberphile.com/team/index.html
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Videos by Brady Haran