"There are a lot of bad things said about Wikipedia, the ninth most-visited destination on the internet. An encyclopedia that anyone can edit, critics argue, is one that is vulnerable to endless mistakes. Such criticisms have been raised by skeptics since Wikipedia's creation in 2001. ... While that ultimate goal imagined by Wales for Wikipedia has not yet come to fruition, there is no questioning the breadth and usefulness of Wikipedia. Those who refused to believe that a user-generated encyclopedia could compete with the monolithic, traditional encyclopedia written by experts and organized by professional editors, were no doubt shocked when Nature magazine published a 2006 article comparing Wikipedia to the well-known Encyclopedia Britannica. The article concluded that Wikipedia articles were comparable in accuracy and thoroughness to those of the older, paper encyclopedia."