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WikipediaWikipedia is an online encyclopedia that is free to read and edit. It contains over 66 million articles in more than 340 languages, collaboratively written and maintained by more than 250,000 active volunteer editors called Wikipedians. As of 2025, it is one of the 10 most visited sites in the world, with 1.5 billion unique monthly site visits. Wikipedia was launched in 2001 by Jimmy Wales and Larry Sanger as an offshoot of Nupedia, which published expert-written articles online following extensive peer review. After producing just 21 articles in their first year, the pair sought a faster method of content output by using wikis—publicly editable websites, whose name derives from the Hawaiian word for "quick"—to feed content to Nupedia. However, it was quickly eclipsed by Wikipedia, which had nearly 20,000 articles after its first year, and Nupedia was shut down in 2003. Opting against ads to maintain its neutrality, Wikipedia is instead financed by the Wikimedia Foundation. The nonprofit manages grants and millions of small donations annually to fund various projects, including Wiktionary and Wikimedia Commons. Alongside human moderation and specific editorial policies, automated bots have helped prevent and undo vandalism on the site, though studies on Wikipedia's reliability are mixed. The site has been criticized for ideological and gender biases among its editors and has been blocked by multiple governments.Explore Wikipedia

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Six Degrees of Wikipedia, where any two articles connect in six clicks or fewerEnter any two topics (or use suggestions) and find the shortest path of links between them. The game playfully illustrates the vast interconnections of human knowledge. Jacob Wenger AI scraping for LLM training data has significantly strained Wikipedia's infrastructureFrom January 2024 to April 2025, the site's bandwidth increased by 50% as automated bots downloaded terabytes of data for the large language models powering AI tools. The Wikimedia Foundation found that bots accounted for 65% of the highest demand requests (e.g., videos) despite representing just 35% of page views. Ars Technica Grokipedia is Elon Musk's rival to WikipediaDeveloped by xAI—a company founded by Musk in 2023—the site features a search bar where users can type in queries, which reports suggest are then answered by the same xAI model powering the Grok chatbot. Grokipedia describes Wikipedia as having "systemic ideological biases" and a "left-leaning slant." PBS In 2013, an asteroid was named after WikipediaA main-belt asteroid previously labeled 274301 was renamed "Wikipedia" by the Committee for Small Body Nomenclature. First observed in 2008 by astronomers at the Andrushivka Astronomical Observatory, the asteroid was renamed based on a suggestion from a member of the Wikimedia Foundation in Ukraine. NBC News Find connections between Wikipedia articles utilizing a node mapping toolMultiple Wikipedia articles can be placed on the map, each with its own node, and expanded to reveal related articles. The goal is to expand as many subsequent nodes as needed to connect articles and identify related concepts. Any node can be double-clicked on to open its respective Wikipedia page. Wikipedia Map Wikipedia edit wars often reflect a strong commitment to accuracy between editorsBattles over grammar and capitalization, names and nationalities, and British versus American spellings of words have taken place due to the collaborative editing nature of the site. The most seemingly trivial debates are catalogued on the site's "Lamest edit wars" page. The Ringer Wikipedia's puzzle globe logo was developed by a 17-year-oldIn 2003, the site held a contest for its users to submit designs for a new logo. Paul Stansifer submitted the winning design, which used the incomplete puzzle as a symbol for the encyclopedia being a work in progress. Symbols and letters would later replace text within Stansifer's colorful design. CNET In 2014, a Wikipedia monument was unveiled in Słubice, PolandCreated from fiber and resin, the $14,000 sculpture features four people holding the Wikipedia globe—the company's logo since 2003. An inscription on the monument pays homage to the anonymous editors who contributed to the site. Atlas Obscura Wikipedia allows users to vote for what the last article on the site will beLabeled as "humorous" on the site, the "Last topic pool" page lists various conditions where Wikipedia's final article would be written, including various end-of-the-world scenarios, instances where humanity might cease to exist, cases of Wikipedia becoming corrupted or uneditable, and the possibility of all possible knowledge having been written about. Wikipedia The unofficial theme song for Wikipedia is based on 'Hotel California'Written by user Elf in 2004, the song's humorous lyrics highlight the efforts of volunteer editors and describe an evening spent by "wikipediholics" improving the site, set to the backdrop of the Eagles' 1976 song. Wikimedia As of 2025, Wikipedia is one of the top 10 most-visited sites in the worldAlphabet Inc.'s Google search engine and YouTube received nearly 150 billion combined visits in November, followed by Facebook, ChatGPT, and Instagram, which each received over 5 billion visits during the same span. With 4.42 billion visits for the month, Wikipedia ranked just behind Reddit's 4.85 billion. Semrush One person has made edits to a third of all articles on the English WikipediaAs of 2025, Steven Pruitt—known online as Ser Amantio di Nicolao—has made over 6 million edits and created more than 33,000 articles since he began contributing to the site in 2004. The Virginia native was named one of Time magazine's 25 most important people on the internet in 2017. Science Focus China has blocked the Wikipedia domain since 2015The Chinese language version of the site had been blocked intermittently since 2004 due to pages featuring topics deemed controversial by the Chinese communist party, including the 1989 Tiananmen Square protests and Taiwan. Once Wikipedia switched to an HTTPS protocol—making it impossible to block individual pages—all Wikipedia pages were blocked. ZME Science Coverage of the 9/11 terrorist attacks helped shape Wikipedia's editorial policiesLaunched nine months earlier, the site was featured on Yahoo's news page, attracting traffic from information seekers as dozens of new editors created hundreds of articles, including memorials, conspiracy theories, and donation and volunteer pages. Discussions between editors would begin establishing rules for handling breaking news events. Fast Company Wikipedia's sister sites include directories of travel guides, species, and mediaLike Wikipedia, volunteers around the world contribute to Wikivoyage, Wikispecies, and Wikimedia Commons to create freely accessible repositories of knowledge. Other projects include Wikibooks, a collection of e-books and annotated texts; Wikisource, which features source documents and historical texts; and Wiktionary, a dictionary covering over 170 languages. Wikimedia Foundation Wikipedia arose from a failed, for-profit online encyclopediaNupedia was launched in 2000 by internet entrepreneur Jimmy Wales and internet project developer Lawrence Sanger, only publishing articles written by experts after a cumbersome seven-step review process. The two developed Wikipedia to allow the public to write articles for future review, but shifting to self-moderation contributed to Sanger's departure in 2002. History.com In late 2007, Wikipedia became the world's largest general encyclopediaThe record had been held for approximately six centuries by the Yongle Encyclopedia, which was commissioned by the Yongle Emperor of the Ming dynasty in 1403 to preserve information from ancient and imperial China. The text comprised 22,937 manuscript rolls in 11,095 volumes. China Daily As of January 2026, 500 new articles are added to the English Wikipedia dailyThe largest Wikipedia language edition features over 7 million articles, followed by the Cebuano edition (over 6 million) and the German edition (over 3 million). The longest article is the "2025 in women's road cycling" page, and the most edited is the list of personnel from World Wrestling Entertainment. Wikipedia A 15-year bibliographic analysis identified systematic gender bias across WikipediaA 2024 study by the University of Barcelona found that 71.4% of all English biographies that appear on the front page are about men, and approximately one in five editors are women. Researchers suggest systemic imbalances in society further diminish women's contributions to the site by leaving them with less time to defend edits during editorial disputes. University of Barcelona Research suggests articles on Wikipedia are about as reliable as 'accurate' sourcesStudies from Nature, The Guardian, the Journal of Clinical Oncology, and the Canadian Library Association, among others, did not identify significant errors, particularly in articles related to academic topics. The site is still considered an exploratory, tertiary source subject to systemic biases from its human editors, especially within controversial topics. The University of Kansas Wikipedia openly displays edit history and editorial disputes to assess trustworthinessUnlike a journal article, which may be reviewed by up to three people before publication, popular Wikipedia pages may be reviewed thousands of times by editors, potentially enhancing their reliability. Less reviewed articles still require reliable third-party sources and remain subject to verification by bots and administrators who can undo edits. The Conversation On average, about five edits are made on Wikipedia every secondAs of 2024, the site is 90 times larger than the 120-volume Encyclopedia Britannica, but its automation tools can often catch and revert inaccurate edits within 60 seconds. Its low-bandwidth, adless pages have allowed it to handle millions of site visits daily, even during times of high internet traffic. Stuff You Should Know Wikipedia articles are read more than 16 billion times every monthNearly 300,000 volunteers worldwide help write, edit, and fact-check articles on the site in real-time, striving to ensure content is authored from a neutral point of view. All pages are freely accessible and must include citations to reliable, published sources. Wikipedia Philip Roth once tried to correct details on one of his novel's Wikipedia pagesThe Wikipedia entry for Roth's 2000 novel "The Human Stain" alleges that the book was based on the life of Anatole Broyard, a Black American writer who "passed" for white, something he shared in common with the main character in Roth's novel, though Roth said that wasn't true. When Roth tried to correct the error, Wikipedia editors told him he would need a secondary source to back up his claim. The Atlantic Explore Wikipedia, but TikTok-styleWikipedia's vast trove of information can be a bit dull to navigate. This homemade website takes real Wikipedia pages and places them in a swipeable format similar to TikTok, so you can learn about very random things in a similar mode as the culture-shifting TikTok app. Check it out here. WikiTok A conversation with Wikipedia’s cofounderIn the early 2000s, the nonprofit free encyclopedia Wikipedia launched and became one of the most visited sites on the internet. This lengthy interview with cofounder Jimmy Wales provides insight into how the encyclopedia originated, how it is funded, its plans for the future, and a number of other facts about the hugely influential resource. Lex Fridman The Wiki Game: get to one Wikipedia topic to another as fast as you canWikipedia, the free, community-built encyclopedia, uses hyperlinks so users can explore topics within topics. This tool often leads readers to go down endless rabbit holes, from one topic to another, endlessly. Now, you can make a game of it by... Explore Wikipedia!A collaborative map lets anyone rename the entire world in real timeRename.world is a playful, community-driven project where users discover, claim, and rename locations across a live global map. It's kind of like Wikipedia meets Google Maps, filtered through the internet's love of chaos and whimsy. rename.world Wikiracing involves moving between two articles in the fewest clicksThe quirky pastime has evolved into a competitive event at yearly Wikimedia conferences, highlighting the interconnectedness of human knowledge. Neuroscientific research suggests lateral thinking is a crucial skill found in successful Wikiracers. Slate Magazine As of 2025, the Wikimedia Foundation funds 14 open-source, free knowledge projectsSince its founding in 2003, the nonprofit has provided financial, legal, and infrastructure support to Wikipedia and its sister projects (e.g., Wikinews), primarily by managing donations, which average $11, from readers. Additional funding comes from gifts exceeding $1,000, the Wikimedia Endowment, and providing Wikipedia content for commercial use. Wikimedia Foundation The software for wikis—user-editable websites—was launched in 1995Computer programmer Ward Cunningham created the WikiWikiWeb online application based on an offline system that helped track how ideas moved through his company. The application enabled users to collaborate and edit website content through a web browser, as well as link pages without requiring a structured navigation scheme. Wikipedia

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