Like most every other internet user, I often end up at Wikipedia.org for one reason or another. Yet I never realized that Wikipedia offers Portals for various categories, like Mathematics:
http://en.wikipedia.org/wiki/Portal:Mathematics
In addition to functioning as a doorway to the vast amount of mathematics available in wikipedia, the portal also offers up selected articles from the archives, a collection of clickable fun facts, and a Picture of the Month.
This is a cool visualization of bicycle usage in London:
http://www.digitalurban.org/2011/02/london-cycle-flows-sociable-physics.html
On October 4th, 2010, there was a public transit strike in London, which maximized bike usage in the city.
The creators claim that the flashes of light that represent the bikes move in accordance with the actual speed and path of the bikes they represent.
An innovative representation that puts me in mind of graph theory and networking!
This is one of funniest things I’ve seen this year, and definitely a contender for the title of Greatest Venn Diagram Ever.
The website www.setgame.com offers a free daily game of SET here:
http://www.setgame.com/set/puzzle_frame.htm
SET is a great categorizing game in which you try to find sets of three whose characteristics are either identical or entirely different.
Four free SET puzzles are published daily by the New York Times, as well:
