Colorful Data Visualizations of Mathematical Constants Pi, Phi, and e

http://laughingsquid.com/colorful-data-visualizations-of-mathematical-constants-pi-phi-and-e/?

Approximations

http://imgs.xkcd.com/comics/approximations.png

Rhapsody on the Proof of Pi = 4

http://www.milkandcookies.com/link/298696/detail/

Are Shakespeare's Plays Encoded within Pi? | MilkandCookies

http://www.milkandcookies.com/link/295237/detail/