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On January 18, 2012, the English Wikipedia participated in a series of coordinated protests against two proposed laws in the United States Congress—the Stop Online Piracy Act (SOPA) and the PROTECT IP Act (PIPA)—by blacking out its pages for 24 hours.On January 20, 2014, Subodh Varma reporting for The Economic Times indicated that not only had Wikipedia's growth stalled, but that it "had lost nearly 10 per cent of its page views last year.Though the English Wikipedia reached three million articles in August 2009, the growth of the edition, in terms of the numbers of new articles and of contributors, appears to have peaked around early 2007.Others suggest that the growth is flattening naturally because articles that could be called "low-hanging fruit"—topics that clearly merit an article—have already been created and built up extensively.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.Vandals can introduce irrelevant formatting, modify page semantics such as the page's title or categorization, manipulate the underlying code of an article, or use images disruptively.In the Seigenthaler biography incident, an anonymous editor introduced false information into the biography of American political figure John Seigenthaler in May 2005.
In January 2007, Wikipedia entered for the first time the top-ten list of the most popular websites in the US, according to com Score Networks.
In 2003, economics Ph D student Andrea Ciffolilli argued that the low transaction costs of participating in a wiki create a catalyst for collaborative development, and that features such as allowing easy access to past versions of a page favor "creative construction" over "creative destruction".
Any change or edit that manipulates content in a way that purposefully compromises the integrity of Wikipedia is considered vandalism.
In certain cases, all editors are allowed to submit modifications, but review is required for some editors, depending on certain conditions.
For example, the German Wikipedia maintains "stable versions" of articles, Although changes are not systematically reviewed, the software that powers Wikipedia provides certain tools allowing anyone to review changes made by others.