The square root of two is a fascinating number with a long and sordid history. It also forms the basis of most office paper, such as A4, A3, etc.
More links & stuff in full description below ↓↓↓

This video features Professor Roger Bowley and Dr James Grime.

NUMBERPHILE
Website: http://www.numberphile.com/
Numberphile on Facebook:   / numberphile  
Numberphile tweets:   / numberphile  
Subscribe: http://bit.ly/Numberphile_Sub

Videos by Brady Haran

Patreon:   / numberphile  

Brady's videos subreddit:   / bradyharan  

Brady's latest videos across all channels: http://www.bradyharanblog.com/

Sign up for (occasional) emails: http://eepurl.com/YdjL9

Numberphile TShirts: https://teespring.com/stores/numberphile
Other merchandise: https://store.dftba.com/collections/n...