It's free to use. It's the sixth-most-popular site in the world. An energetic army of volunteers keeps it current. And it pays its bills with donations.
For all the great information we've pulled from Wikipedia over the years, be it for a term paper or a bar bet, we want to celebrate some of the interesting facts about the site itself.
Do you know the Wikipedia theme song? Do you know who has the most-edited Wikipedia page ever?