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World Book Encyclopedia. The World Book Encyclopedia is an American encyclopedia. [1] World Book was first published in 1917. Since 1925, a new edition of the encyclopedia has been published annually. [1] Although published online in digital form for a number of years, World Book is currently the only American encyclopedia which also still ...
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 ...
Appearance. For common errors in logic, see List of fallacies. Cognitive biases are systematic patterns of deviation from norm and/or rationality in judgment. They are often studied in psychology, sociology and behavioral economics. [1] Although the reality of most of these biases is confirmed by reproducible research, [2] [3] there are often ...
A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [1] IANA also oversees the approval process for new proposed top-level domains for ICANN. As of April 2021 [update], their root domain contains 1502 top-level domains. [2] [3] As of March 2021 [update], the IANA root ...
Each entry on this list should be an article on its own (not merely a section in a less unusual article) and of decent quality, and in large meeting Wikipedia's manual of style. For unusual contributions that are of greater levity, see Wikipedia:Silly Things. In this list, a star indicates a featured article. A plus indicates a good article.
While races over imperial measured distances were very common in the first half of the 20th century, only the mile remains common today due to its historical prominence in track and field: all other imperial measured distance races became increasingly rare, and the IAAF deleted these events from the world record books in 1976. In November 2019 ...
Birthday paradox: In a random group of only 23 people, there is a better than 50/50 chance two of them have the same birthday. Borel's paradox: Conditional probability density functions are not invariant under coordinate transformations. Boy or Girl paradox: A two-child family has at least one boy.
Books of hours ( Latin: horae) are Christian prayer books, which were used to pray the canonical hours. [2] The use of a book of hours was especially popular in the Middle Ages, and as a result, they are the most common type of surviving medieval illuminated manuscript.