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This is Numberphile. We mainly post videos about mathematics and just numbers in general.

Base 60 (sexagesimal)

Base 60 (sexagesimal)

The ancient Babylonians used a number system with base 60 (sexagesimal).

Tablet image courtesy of Bill Casselman and Yale Babylonian Collection - more at http://www.math.ubc.ca/~cass/Euclid/ybc/ybc.html

This video features Thomas Woolley - he tweets at https://twitter.com/#!/thomasewoolley

How big is a billion?

How big is a billion?

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What is a lucky number?