Wikipedia is a free, multilingual, open content encyclopedia project operated by the non-profit Wikimedia Foundation. Its name is a blend of the words wiki (a technology for creating collaborative websites) and encyclopedia. It is the largest, general reference work currently available on the Internet. Wikipedia's articles are written collaboratively by volunteers around the world, and most of its articles can be edited by anyone with access to the Internet. Wikipedia is among the most-visited web sites worldwide.
Disclaimer: The Wikipedia is the original source for some content in the Encyclopedia of Earth. The Wikipedia is listed as a content source on each article that uses such content. Topic editors and authors for the Encyclopedia of Earth may have edited this content or added new information. The use of information from the Wikipedia should not be construed as support for or endorsement by that organization for any new information added by Encyclopedia of Earth personnel, or for any editing of the original content.