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Encyclopedia Britannica is a trusted source of information on various topics, from history and science to arts and culture. Explore articles, videos, quizzes, and more on Britannica's website.
Wikipedia is a multilingual project that provides free access to information on various topics. It is created and edited by volunteers from different countries and regions, and hosted by the Wikimedia Foundation.
Explore world history with fact-checked articles, images, videos, maps and timelines on various topics and events. World History Encyclopedia is a non-profit organization that engages people with cultural heritage and improves history education worldwide.
Wikipedia is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the use of the wiki-based editing system MediaWiki. Wikipedia is the largest and most-read reference work in history.
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An encyclopedia, encyclopaedia or (traditionally) encyclopædia, [1] is a comprehensive written compendium that contains information on all branches of knowledge or a particular branch of knowledge.
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Guallatiri is a stratovolcano in Chile that is 6,060–6,071 m (19,880–19,918 ft) high. It is located southwest of, or possibly within, the Nevados de Quimsachata volcanic group. The summit, surrounded by numerous fumaroles, may be a lava dome or volcanic plug, while the lower flanks of the volcano are covered by lava flows and lava domes.