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Wikipedia is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the use of the wiki-based editing system MediaWiki. Wikipedia is the largest and most-read reference work in history.
The English Wikipedia is the primary English-language edition of Wikipedia, an online encyclopedia. It was created by Jimmy Wales and Larry Sanger on 15 January 2001, as Wikipedia's first edition. English Wikipedia is hosted alongside other language editions by the Wikimedia Foundation, an American nonprofit organization.
Wikipedia currently has more than sixty-three million articles in more than 300 languages, including 6,828,995 articles in English, with 120,065 active contributors in the past month. Wikipedia's fundamental principles are summarized in its five pillars.
Wikipedia was initially conceived as a feeder project for the Wales-founded Nupedia, an earlier project to produce a free online encyclopedia, volunteered by Bomis, a web-advertising firm owned by Jimmy Wales, Tim Shell and Michael E. Davis.
Wikipedia is a free encyclopedia, written collaboratively by the people who use it. Since 2001, it has grown rapidly to become the world's largest reference website, with 6.8 million articles in English attracting of views every month. For a more detailed account of the project, see About Wikipedia.
Browse Wikipedia's category pages, which index articles by subject. Category:Main topic classifications – Arts, History, Technology, and more. Wikipedia:Contents/Categories – Hand-crafted list of topic categories. Category:People – Biographies.
The home page of the English Wikipedia. The English Wikipedia has the largest user base among wikis on the World Wide Web and ranks in the top 10 among all Web sites in terms of traffic. Other large wikis include the WikiWikiWeb, Memory Alpha, Wikivoyage, and previously Susning.nu, a Swedish-language knowledge base.
The English Wikipedia, which was started in 2001, became the world's largest encyclopedia in 2004 at the 300,000 article stage. By late 2005, Wikipedia had produced over two million articles in more than 80 languages with content licensed under the copyleft GNU Free Documentation License.
Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.