Wikipedia logos at a Wikimedia conference in Frankfurt, Germany, in 2005. (Boris Roessler/European Pressphoto Agency) It’s fun to imagine what would have happened if Alexander the Great had the ...

But our other senses are just as powerful, and corporations spend millions of dollars developing signature audio logos. Thanks to the power of crowdsourcing, Wikipedia now has a sound logo of its own.

That's why we're here. DOMANICK: For five hours, two dozen or so volunteers congregate over laptops, cups of coffee and doughnuts iced with the Wikipedia logo. They're writing new entries for ...