Knol: A unit of knowledge

Taken on as Wikipedia's competitor, Google has opened up Knol, which puts a stronger emphasis on authorship and encourages users to start different knols for the same subject.

The Knol project is a site that hosts many knols — units of knowledge — written about various subjects. The authors of the knols can take credit for their writing, provide credentials, and elicit peer reviews and comments. Users can provide feedback, comments, and related information. So the Knol project is a platform for sharing information, with multiple cues that help you evaluate the quality and veracity of information.

Everyone knows something. See what people are writing about, then tell the world what you know: http://knol.google.com/