Source: New York Times — Jul 24, 2008

Seven months after Google began testing a service called Knol, a Wikipedia competitor, the company on Wednesday finally rolled it out.

On Knol, articles on various topics are penned by individuals, and in many cases, experts — not anonymously. Knol authors can choose to benefit from the “wisdom of the crowds” by letting others edit or supplement their articles. But those changes make it into Knol entries only with the author’s permission.