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This article is about this online encyclopedia itself. For Wikipedia's visitor introduction, see Wikipedia: About. The following year, Time magazine stated that the open-door policy of allowing anyone to edit had made Wikipedia the biggest and possibly the best encyclopedia in the world, and was a testament to the vision of Jimmy Wales.
Nupedia was initially licensed under its own Nupedia Open Content License, but even before Wikipedia was founded, Nupedia switched to the GNU Free Documentation License at the urging of Richard Stallman.
In the same interview, Wales also claimed the number of editors was "stable and sustainable".
A 2013 article titled "The Decline of Wikipedia" in MIT's Technology Review questioned this claim.
Vandalism can also include advertising and other types of spam.In April 2019, an etched copy of Wikipedia is now on the Moon after surviving a crash landing of Beresheet, a failed Israeli lunar lander, according to experts.It started almost entirely open—anyone could create articles, and any Wikipedia article could be edited by any reader, even those who did not have a Wikipedia account.Sometimes editors commit vandalism by removing content or entirely blanking a given page.Less common types of vandalism, such as the deliberate addition of plausible but false information to an article can be more difficult to detect.