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On January 15, 2001, a website called Wikipedia was launched. Since then, the crowd-sourced, online encyclopedia has completely changed how people find information quickly, replacing books and CDs (remember "Encarta?") with millions of entries written by ordinary people.
How much has Wikipedia grown in the last decade and a half?
The number of pageviews Wikipedia gets every month, according to the Pew research Center. The site is the seventh most visited in the world, according to website-ranking site Alexa, sitting behind Web behemoths like Google, Facebook and YouTube (who rank one, two and three, respectively).
Total number of English-language articles on Wikipedia, according to the site. On average, 800 new articles are added every day.
Views Wikipedia's most visited page, "Lists of deaths by year," received in 2015, according to Pew.
Year it was discovered that more than 1,000 Wikipedia edits had come from IP addresses within U.S. House and Senate offices, according to the site. Those address have since been blocked, and last year the @congressedits Twitter account was created to automatically publish edits detected from Congressional offices.
Number of times the Wikipedia page on George W. Bush has been edited. That makes it the most heavily edited subject on the site, said a recently released list on the Wikimedia blog, above Michael Jackson (28,152), Jesus (25,084) and The Beatles (22,399).
Years that Encyclopaedia Britannica was in print before it went online-only in 2012.
Volumes, each 700 pages, printed out by artist and programmer Michael Mandiberg to create a physical version of Wikipedia for an art installation in New York City in 2015.
Language editions of Wikipedia, according to the site. English is by far the most popular, followed by Swedish, German and Dutch.
Amount of money the Wikimedia Endowment, which aims to "serve as a perpetual source of support for the operation and activities of Wikipedia and its sister projects," said on Thursday it hopes to raise by 2026.