Wikipedia is the world's newest, largest, most varied, most participatory, and most controversial encyclopedia. It is composed and edited entirely by volunteer netizens; as of November 2004, there were some 29,000 "Wikipedians" writing for it in 109 different languages. The site's massive archive, including 380,000 articles in English alone, puts even Britannica to shame. If you don't see an article addressing your passion for miniature-teapot collecting, don't fret. Just write one.

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