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| File:Michel de Montaigne.jpg|link=Michel de Montaigne (nonfiction)|1533: Philosopher and author [[Michel de Montaigne (nonfiction)|Michel de Montaigne]] born. He will be one of the most significant philosophers of the French Renaissance, known for popularizing the essay as a literary genre. | | File:Michel de Montaigne.jpg|link=Michel de Montaigne (nonfiction)|1533: Philosopher and author [[Michel de Montaigne (nonfiction)|Michel de Montaigne]] born. He will be one of the most significant philosophers of the French Renaissance, known for popularizing the essay as a literary genre. |
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| ||1535: Cornelius Gemma born ... astronomer and astrologer.
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| File:Jost Bürgi.jpg|link=Jost Bürgi (nonfiction)|1552: Clockmaker and mathematician [[Jost Bürgi (nonfiction)|Jost Bürgi]] born. He will be recognized during his own lifetime as one of the most excellent mechanical engineers of his generation. | | File:Jost Bürgi.jpg|link=Jost Bürgi (nonfiction)|1552: Clockmaker and mathematician [[Jost Bürgi (nonfiction)|Jost Bürgi]] born. He will be recognized during his own lifetime as one of the most excellent mechanical engineers of his generation. |
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| ||1675: Guillaume Delisle born ... cartographer.
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| ||1683: René Antoine Ferchault de Réaumur born ... entomologist and writer who contributed to many different fields, especially the study of insects. He introduced the Réaumur temperature scale.
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| ||1691: Joseph Moxon dies ... hydrographer to Charles II, was an English printer specialising in mathematical books and maps, a maker of globes and mathematical instruments, and mathematical lexicographer. He produced the first English language dictionary devoted to mathematics, and the first detailed instructional manual for printers. In November 1678, he became the first tradesman to be elected as a Fellow of the Royal Society. Pic.
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| File:John Arbuthnot.jpg|link=John Arbuthnot (nonfiction)|1692: Physician, satirist, and polymath [[John Arbuthnot (nonfiction)|John Arbuthnot]] uses [[Gnomon algorithm]] techniques to rewrite existing manuscripts using satirical premises.
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| ||1704: Louis Godin born ... astronomer and academic.
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| ||1735: Alexandre-Théophile Vandermonde born ... mathematician, musician and chemist who worked with Bézout and Lavoisier; his name is now principally associated with determinant theory in mathematics.
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| ||1742: Willem Jacob 's Gravesande dies ... mathematician and natural philosopher, chiefly remembered for developing experimental demonstrations of the laws of classical mechanics. As professor of mathematics, astronomy, and philosophy at Leiden University, he helped to propagate Isaac Newton's ideas in Continental Europe.
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| ||1792: Karl Ernst von Baer born ... biologist, meteorologist, and geographer.
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| ||1825: Joseph Thomas Clover born ... doctor and pioneer of anaesthesia. He invented a variety of pieces of apparatus to deliver anaesthetics including ether and chloroform safely and controllably. By 1871 he had administered anaesthetics 13,000 times without a fatality.
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| ||1844: A gun on USS Princeton explodes while the boat is on a Potomac River cruise, killing six people, including two United States Cabinet members.
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| ||1849: Regular steamboat service from the west to the east coast of the United States begins with the arrival of the SS California in San Francisco Bay, four months 22 days after leaving New York Harbor.
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| ||1859: Manuel John Johnson dies ... astronomer.
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| ||1878: Pierre Fatou born ... mathematician and astronomer. Pic.
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| ||1882: John Thomas Romney Robinson dies ... astronomer and physicist. He was the longtime director of the Armagh Astronomical Observatory, one of the chief astronomical observatories in the UK of its time. Robinson will invent the 4-cup anemometer. Pic.
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| ||1885: The American Telephone and Telegraph Company is incorporated in New York as the subsidiary of American Bell Telephone. (American Bell would later merge with its subsidiary.)
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| ||1900: Wolf Hirth born ... German pilot and engineer, co-founded Schempp-Hirth.
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| File:Linus Pauling.jpg|link=Linus Pauling (nonfiction)|1901: Chemist, biochemist, peace activist, author, and educator [[Linus Pauling (nonfiction)|Linus Pauling]] born. | | File:Linus Pauling.jpg|link=Linus Pauling (nonfiction)|1901: Chemist, biochemist, peace activist, author, and educator [[Linus Pauling (nonfiction)|Linus Pauling]] born. |
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| ||1906: Bugsy Siegel born ... gangster.
| | File:Rhizolith Group.jpg|link=Rhizolith Group|1967: Modern dance geology company '''[[Rhizolith Group]]''' debuts a new work, "Coriolis Force and Particulate Deposit Patterns in Paleoglacial Sedimentary Deposits". |
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| ||1907: Milton Caniff born ... cartoonist.
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| ||1915: Peter Medawar born ... biologist and immunologist, Nobel Prize laureate.
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| ||1921: Pierre Clostermann born ... pilot, engineer, and author.
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| ||1925: The Charlevoix-Kamouraska earthquake strikes northeastern North America.
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| ||1929: Clemens von Pirquet dies ... physician and immunologist.
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| ||1932: Guillaume Bigourdan dies ... astronomer and academic.
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| ||1933: Gleichschaltung: The Reichstag Fire Decree is passed in Germany a day after the Reichstag fire.
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| ||1935: Gustav Ritter von Escherich dies ... mathematician. Pic: https://austria-forum.org/af/Biographien/Escherich%2C_Gustav_von
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| ||1935: DuPont scientist Wallace Carothers invents nylon.
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| ||1936: Charles Nicolle, French biologist and academic, Nobel Prize laureate (b. 1866)
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| ||1939: The erroneous word "dord" is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation.
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| File:Der Reichsspritzenmeister.jpg|link=Der Reichsspritzenmeister|1944: [[Der Reichsspritzenmeister]] develops new drug to stimulate [[crimes against mathematical constants]]. | |
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| ||1948: Michael John Caldwell Gordon born ... computer scientist. He led the development of the HOL theorem prover. The HOL system is an environment for interactive theorem proving in a higher-order logic.
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| ||1953: James Watson and Francis Crick announce to friends that they have determined the chemical structure of DNA; the formal announcement takes place on April 25 following publication in April's Nature (pub. April 2).
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| ||1954: The first color television sets using the NTSC standard are offered for sale to the general public.
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| ||1956: Frigyes Riesz dies ... mathematician who made fundamental contributions to functional analysis. Pic.
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| ||1959: Discoverer 1, an American spy satellite that is the first object intended to achieve a polar orbit, is launched but fails to achieve orbit.
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| ||1960: Teiji Takagi dies ... mathematician, best known for proving the Takagi existence theorem in class field theory. The Blancmange curve, the graph of a nowhere-differentiable but uniformly continuous function, is also called the Takagi curve after his work on it.
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| ||1993: The Bureau of Alcohol, Tobacco and Firearms agents raid the Branch Davidian church in Waco, Texas with a warrant to arrest the group's leader David Koresh. Four ATF agents and six Davidians die in the initial raid, starting a 51-day standoff.
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| ||1997: GRB 970228, a highly luminous flash of gamma rays, strikes the Earth for 80 seconds, providing early evidence that gamma-ray bursts occur well beyond the Milky Way.
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| ||1998: First flight of RQ-4 Global Hawk, the first unmanned aerial vehicle certified to file its own flight plans and fly regularly in U.S. civilian airspace.
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| ||2006: Owen Chamberlain dies ... physicist and academic, Nobel Prize laureate.
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| ||2013: Donald A. Glaser dies ... physicist and biologist, Nobel Prize laureate.
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| ||2014: Lee Lorch dies ... mathematician and activist.
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| File:Burglars excerpt 1.jpg|link=Burglars (Gnomon Chronicles)|2017: Steganographic analysis of [[Burglars (Gnomon Chronicles)|excerpt from "Burglars"]] unexpected reveals "at least half a gigabyte of encrypted data, probably related to the [[ENIAC (SETI)|ENIAC program]]".
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| </gallery> | | </gallery> |
