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A project to develop a comprehensive compendium of knowledge

Welcome to Citizendium, a wiki for providing free knowledge where authors use their real, verified names. We welcome anyone who wants to share their knowledge by writing and improving articles on virtually any subject. Expert authors can be recognized with a special role, but membership is open to all.

See Recent Changes—an overview of articles we are writing now.

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Our help system and forum
Questions and answers to help you find the information you need


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Funds are used to pay for hosting our servers.
See our financial report for complete details.
Please make your donations here.


Some of our finest

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Citable Articles (159)
Developed Articles (1,129)
(16,873 total articles)

That which we know is a little thing; that which we do not know is immense.
Pierre-Simon de Laplace (1749-1827), French physicist and mathematician, systematizer and elaborator of probability theory
       —add a quotation about knowledge or writing
Did You Know?
Citizendium Blog - Latest entry: 01-Jan-2013

Monthly Donation Day  |  Monthly Donor Honor Roll

CZ:Monthly Honor Roll of Users Editing the Wiki

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