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| ||1624: Henrik Rysensteen born ... military engineer. Pic.
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| ||1643: Benedetto Castelli dies ... mathematician. No DOB. Pic
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| ||1754: Christian Wolff dies ... philosopher. Wolff was the most eminent German philosopher between Leibniz and Kant. His main achievement was a complete oeuvre on almost every scholarly subject of his time, displayed and unfolded according to his demonstrative-deductive, mathematical method. Pic.
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| File:Thomas Seebeck.jpg|link=Thomas Johann Seebeck (nonfiction)|1770: Physicist and academic [[Thomas Johann Seebeck (nonfiction)|Thomas Johann Seebeck]] born. Seebeck will discover the thermoelectric effect. | | File:Thomas Seebeck.jpg|link=Thomas Johann Seebeck (nonfiction)|1770: Physicist and academic [[Thomas Johann Seebeck (nonfiction)|Thomas Johann Seebeck]] born. Seebeck will discover the thermoelectric effect. |
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| ||1791: George Peacock born ... mathematician. Pic.
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| File:Joseph-Louis Lagrange.jpg|link=Joseph-Louis Lagrange (nonfiction)|1805: Mathematician and crime-fighter [[Joseph-Louis Lagrange (nonfiction)|Joseph-Louis Lagrange]] delivers lecture on applications of number theory to the detection and prevention of [[crimes against mathematical constants]].
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| ||1806: Isambard Kingdom Brunel born ... mechanical and civil engineer who is considered "one of the most ingenious and prolific figures in engineering history". Pic.
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| ||1830: Eadweard Muybridge born ... photographer and cinematographer. Pic.
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| ||1834: Edmond Laguerre born ... mathematician, a member of the Académie française (1885). His main works were in the areas of geometry and complex analysis. He also investigated orthogonal polynomials (see Laguerre polynomials). Laguerre's method is a root-finding algorithm tailored to polynomials. Pic.
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| ||1850: William Prout born ... chemist, physician, and natural theologian. He is remembered today mainly for what is called Prout's hypothesis. Pic.
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| File:Edouard-Léon Scott de Martinville.jpg|link=Édouard-Léon Scott de Martinville (nonfiction)|1860: On his phonautograph machine, [[Édouard-Léon Scott de Martinville (nonfiction)|Édouard-Léon Scott de Martinville]] makes the oldest known recording of an audible human voice. A visual recording of audio data, it will first be played back in 2008. | | File:Edouard-Léon Scott de Martinville.jpg|link=Édouard-Léon Scott de Martinville (nonfiction)|1860: On his phonautograph machine, [[Édouard-Léon Scott de Martinville (nonfiction)|Édouard-Léon Scott de Martinville]] makes the oldest known recording of an audible human voice. A visual recording of audio data, it will first be played back in 2008. |
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| File:Wilhelm Röntgen.jpg|link=Wilhelm Röntgen (nonfiction)|1864: Engineer and physicist [[Wilhelm Röntgen (nonfiction)|Wilhelm Röntgen]] uses X-rays generator to expose [[Loaded dice (nonfiction)|loaded dice]], reveals organized [[math crime]] cartel in casinos around the world.
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| File:Charles Proteus Steinmetz.jpg|link=Charles Proteus Steinmetz (nonfiction)|1865: Mathematician and electrical engineer [[Charles Proteus Steinmetz (nonfiction)|Charles Proteus Steinmetz]] born. Steinmetz will foster the development of alternating current, formulating mathematical theories which will advance the expansion of the electric power industry in the United States. | | File:Charles Proteus Steinmetz.jpg|link=Charles Proteus Steinmetz (nonfiction)|1865: Mathematician and electrical engineer [[Charles Proteus Steinmetz (nonfiction)|Charles Proteus Steinmetz]] born. Steinmetz will foster the development of alternating current, formulating mathematical theories which will advance the expansion of the electric power industry in the United States. |
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| ||1866: André-Michel Guerry dies ... lawyer and amateur statistician. Together with Adolphe Quetelet he may be regarded as the founder of moral statistics which led to the development of criminology, sociology and ultimately, modern social science. Pic: map.
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| ||1869: Élie Cartan born ... mathematician who did fundamental work in the theory of Lie groups and their geometric applications. He also made significant contributions to mathematical physics, differential geometry, differential equations, group theory and quantum mechanics. Pic.
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| ||1878: Marcel Grossmann born ... mathematician and a friend and classmate of Albert Einstein. Pic.
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| ||1883: Frank King born ... cartoonist ''Gasoline Alley''. Pic.
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| ||1889: Michel Eugène Chevreul dies ... chemist and academic ... worked with fatty acids led to early applications in the fields of art and science. He is credited with the discovery of margaric acid, creatine, and designing an early form of soap made from animal fats and salt. He lived to 102 and was a pioneer in the field of gerontology. Pic (cool).
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| ||1894: Cypra Cecilia Krieger-Dunaij born ... mathematician ... well known for having translated two works of Wacław Sierpiński in general topology. Pic.
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| ||1894: Alfred Theodor Brauer born ... mathematician who did work in number theory. Pic.
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| File:Moritz Benedikt Cantor.jpg|link=Moritz Cantor (nonfiction)|1895: Mathematician, historian, and [[APTO]] librarian [[Moritz Cantor (nonfiction)|Moritz Cantor]] publishes his monumental study ''Vorlesungen über Geschichte der Gnomonik'', which traces the history of [[Gnomon algorithm]] theory up to 1799.
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| ||1900: Vladimir Borisovich Rojansky born ... physicist, author and educator. Antimatter. Pic: https://www.aip.org/history-programs/niels-bohr-library/photos/rojansky-vladimir-d1
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| ||1903: Gregory Pincus born ... endocrinologist whose work on the antifertility properties of steroids led to the development of the first effective oral contraceptive: the birth-control pill. In 1934, Pincus made national headlines by achieving in-vitro fertilization of rabbits. The public was not ready for the vision of test-tube babies; instead of fame, he received notoriety. Consequently, he moved a small independent laboratory. There he did applied research, especially on steroids. In 1953, he was approached about developing a new form of contraception. He focussed on using progesterone as an effective anti-ovulent, and showed it could be a good contraceptive drug. In 1960, a synthetic progesterone drug was approved for contraceptive use. Pic.
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| ||1918: Jørn Utzon born ... architect, designed the Sydney Opera House. Pic.
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| ||1919: J. Presper Eckert born ... engineer, invented the ENIAC. Pic (cool tech).
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| ||1921: Mary Jackson born ... mathematician and aerospace engineer. Pic.
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| ||1921: Eugen Merzbacher born ... physicist and academic ... applications of quantum mechanics to atomic and nuclear collision theory. Pic search.
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| ||1922: Traugott Sandmeyer dies ... chemist after whom the Sandmeyer reaction, which he discovered 1884, was named. Sandmeyer also invented a new synthesis for indigo. Pic.
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| ||1924: Milburn G. Apt born ... in 1956 he will become the first man to exceed Mach 3 while flying the Bell X-2. Shortly thereafter, the craft wil go out of control, killing Apt. Pic.
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| ||1930: F. Albert Cotton born ... chemist and academic ... recognized for his research on the chemistry of the transition metals. Pic search.
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| ||1940: Vidkun Quisling seizes power in Norway. Pic.
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| ||1945: Execution of Dietrich Bonhoeffer, anti-Nazi dissident and spy, by the Nazi regime. Pic.
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| ||1945: The United States Atomic Energy Commission is formed.
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| ||1951: Vilhelm Bjerknes dies ... physicist and meteorologist. Pic.
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| ||1953: Hans Reichenbach dies ... as a leading philosopher of science, educator, and proponent of logical empiricism. He was influential in the areas of science, education, and of logical empiricism: he made lasting contributions to the study of empiricism based on a theory of probability; the logic and the philosophy of mathematics; space, time, and relativity theory; analysis of probabilistic reasoning; and quantum mechanics. Pic.
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| ||1959: Frank Lloyd Wright dies ... architect, designed the Price Tower and Fallingwater. Pic.
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| ||1959: Project Mercury: NASA announces the selection of the United States' first seven astronauts, whom the news media quickly dub the "Mercury Seven".
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| ||1961: Washington Square shutdown: Sunday folk music was regularly played in Washington Square Park on Sundays until April 9, 1961 when Newbold Morris rejected the folkies' application for a permit with no explanation. A riot ensued with many of the folk singers being arrested by police and placed into paddy wagons. Some people suspected that local real estate interests were involved, wanting to rid the park of beatniks and other "undesirables," as some called them. But whether Morris had been influenced by such interests was never determined. The riot and arrests themselves got plenty of newspaper coverage, with one headline proclaiming "3,000 Beatniks Riot in Village." But the hysteria faded quickly.
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| ||1965: Astrodome opens. First indoor baseball game is played.
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| File:Skip Digits.jpg|link=Skip Digits|1978: Musician and alleged math criminal [[Skip Digits]] performs at the Kennedy Center for the Arts. | | File:Skip Digits.jpg|link=Skip Digits|1978: Musician and alleged math criminal [[Skip Digits]] performs at the Kennedy Center for the Arts. |
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| ||1981: The U.S. Navy nuclear submarine USS ''George Washington'' accidentally collides with the ''Nissho Maru'', a Japanese cargo ship, sinking it.
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| ||1982: Robert Havemann dies ... chemist, and an East German dissident. Pic.
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| ||1982: Maximilian Herzberger dies ... mathematician and physicist, known for his development of the superachromat lens. Pic.
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| ||1983: Yozo Matsushima dies ... mathematician. Pic search.
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| ||2002: Leopold Vietoris dies ... soldier, mathematician, and academic. Pic.
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| ||2003: Jerry Bittle dies ... cartoonist. Pic search.
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| ||2007: Dorrit Hoffleit dies ... astronomer and academic. Pic.
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| ||2011: Jerry Lawson born ... electronic engineer and inventor ... known for his work in designing the Fairchild Channel F video game console as well as pioneering the commercial video game cartridge. Pic.
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| ||2015: Alexander Dalgarno dies ... physicist and academic. Pic.
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| ||2016: Duane Clarridge dies ... spy. Pic search.
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| File:Green Tangle.jpg|link=Green Tangle (nonfiction)|2018: ''[[Green Tangle (nonfiction)|Green Tangle]]'' voted Picture of the Day by the citizens of [[New Minneapolis, Canada]].
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| </gallery> | | </gallery> |
