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Various collaborative online encyclopedias were attempted before the start of Wikipedia, but with limited success. [19] Wikipedia began as a complementary project for Nupedia, a free online English-language encyclopedia project whose articles were written by experts and reviewed under a formal process. [20]
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history. For events from c. 500 – c. 1499, see: Timeline of post-classical history. For events from c. 1500, see: Timelines of modern history.
A faithful effort has been made in the World Book to avoid this common defect." The encyclopedia's name would later be shortened to its current name World Book. [1] In 1919, World Book became the property of W.F. Quarrie & Company. The new owners created an editorial board to help make sure the entries were aligned with what students studied ...
The Australasian shoveler (Spatula rhynchotis) is a species of dabbling duck in the family Anatidae. It is native to southwestern and southeastern Australia, including Tasmania, and New Zealand. It ranges in length from 46 to 53 centimetres (18 to 21 inches) and lives in heavily vegetated swamps. This male Australasian shoveler was photographed ...
Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [ 1 ] including 1 billion people in more than 193 countries. [ 2 ][ 1 ][ 3 ] In 1969 at a UNESCO Conference in San ...
Crash Course. (web series) Crash Course (sometimes stylized as CrashCourse) is an educational YouTube channel started by John Green and Hank Green (collectively the Green brothers), who became known on YouTube through their Vlogbrothers channel. [2][3][4] Crash Course was one of the hundred initial channels funded by YouTube's $100 million ...
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
History and academics. World history (field), or global history, a field of historical study that takes a worldwide/global perspective. Big History, an academic discipline that takes an astronomical perspective (from the Big Bang to the present) Chronology of the universe, the history and future of the universe according to Big Bang cosmology.