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| File:René Descartes.jpg|link=René Descartes (nonfiction)|1596: Mathematician and philosopher [[René Descartes (nonfiction)|René Descartes]] born. He will be remembered as the father of modern Western philosophy. | | File:René Descartes.jpg|link=René Descartes (nonfiction)|1596: Mathematician and philosopher '''[[René Descartes (nonfiction)|René Descartes]]''' born. Descartes will be remembered as the father of modern Western philosophy. |
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| ||1730 – Étienne Bézout, French mathematician and theorist (d. 1783) | | File:Etienne Bezout.jpg|link=Étienne Bézout (nonfiction)|1730: Mathematician and theorist '''[[Étienne Bézout (nonfiction)|Étienne Bézout]]''' born. Bezout's ''Théorie générale des équations algébriques'' will contain much new and valuable matter on the theory of elimination and symmetrical functions of the roots of an equation. |
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| ||1777 – Charles Cagniard de la Tour, French physicist and engineer (d. 1859) | | File:Antoine Augustin Cournot.jpg|link=Antoine Augustin Cournot (nonfiction)|1877: Mathematician and philosopher '''[[Antoine Augustin Cournot (nonfiction)|Antoine Augustin Cournot]]''' dies. Cournot introduced the ideas of functions and probability into economic analysis. |
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| ||Archibald Scott Couper (b. 31 March 1831) was a Scottish chemist who proposed an early theory of chemical structure and bonding. He developed the concepts of tetravalent carbon atoms linking together to form large molecules, and that the bonding order of the atoms in a molecule can be determined from chemical evidence. Pic. | | File:The Glass Tweet Game.jpg|link=The Glass Tweet Game|1943: Publication of '''''[[The Glass Tweet Game]]''''', the last full-length tweet-chain by author and alleged time-traveler Hermann Hesse. |
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| ||Diederik Johannes Korteweg (b. 31 March 1848) was a Dutch mathematician. He is now best remembered for his work on the Korteweg–de Vries equation, together with Gustav de Vries. | | File:Explorer_1.jpg|link=Explorer 1 (nonfiction)|1970: The spacecraft '''[[Explorer 1 (nonfiction)|Explorer 1]]''' re-enters the Earth's atmosphere after 12 years in orbit. Explorer 1 was the first satellite launched by the United States. |
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| ||1847 – Yegor Ivanovich Zolotarev, Russian mathematician and theorist (d. 1878) Yegor (Egor) Ivanovich Zolotarev (March 31, 1847) was a Russian mathematician. | | File:Clifford Shull 1949.jpg|link=Clifford Shull (nonfiction)|2001: Physicist and academic '''[[Clifford Shull (nonfiction)|Clifford Shull]]''' dies. Shull shared the 1994 Nobel Prize in Physics with Bertram Brockhouse for the development of the neutron scattering technique. |
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| File:USS Cairo.jpg|link=USS Cairo (nonfiction)|1861: [[USS Cairo (nonfiction)|USS Cairo]] retrofitted with military [[scrying engine]] device.
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| ||Friedrich Julius Richelot (d. 31 March 1875) was a German mathematician. Richelot authored numerous publications in German, French and Latin, among them — with his 1832 dissertation — the first known guide to the Euclidean construction of the regular 257-gon with compass and straightedge. Pic.
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| File:Antoine Augustin Cournot.jpg|link=Antoine Augustin Cournot (nonfiction)|1877: Mathematician and philosopher [[Antoine Augustin Cournot (nonfiction)|Antoine Augustin Cournot]] dies. He introduced the ideas of functions and probability into economic analysis.
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| ||1884 – Adriaan van Maanen, Dutch-American astronomer and academic (d. 1946)
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| ||1889 – The Eiffel Tower is officially opened.
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| ||1890 – William Lawrence Bragg, Australian-English physicist and academic, Nobel Prize laureate (d. 1971) Sir William Lawrence Bragg CH, OBE, MC, FRS[1] (31 March 1890 – 1 July 1971) was an Australian-born British physicist and X-ray crystallographer, discoverer (1912) of Bragg's law of X-ray diffraction, which is basic for the determination of crystal structure. He was joint winner (with his father, William Henry Bragg) of the Nobel Prize in Physics in 1915
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| ||1906 – Sin-Itiro Tomonaga, Japanese physicist and academic, Nobel Prize laureate (d. 1979)
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| ||Klaus Wagner (b. March 31, 1910) was a German mathematician - topology, graph theory. Wagner's theorem characterizes the planar graphs as exactly those graphs that do not have as a minor either a complete graph K5 on five vertices or a complete bipartite graph K3,3 with three vertices on each side of its bipartition. Pic.
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| ||1918 – Daylight saving time goes into effect in the United States for the first time.
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| ||Paul Gustav Heinrich Bachmann (d. 31 March 1920) was a German mathematician. His major works include ''Analytische Zahlentheorie'', a work on analytic number theory in which Big O notation was first introduced.
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| ||1945 – Hans Fischer, German chemist and academic, Nobel Prize laureate (b. 1881)
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| ||1945 – World War II: A defecting German pilot delivers a Messerschmitt Me 262A-1, the world's first operational jet-powered fighter aircraft, to the Americans, the first to fall into Allied hands.
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| ||1947 – Eliyahu M. Goldratt, Israeli physicist and economist (d. 2011)
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| ||1951 – Remington Rand delivers the first UNIVAC I computer to the United States Census Bureau.
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| ||1966 – The Soviet Union launches Luna 10 which later becomes the first space probe to enter orbit around the Moon.
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| File:Robin Farquharson.jpg|link=Robin Farquharson (nonfiction)|1967: Mathematician and crime-fighter [[Robin Farquharson (nonfiction)|Robin Farquharson]] publishes proof that most voting systems are vulnerable to [[crimes against mathematical constants]].
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| ||1970 – Explorer 1 re-enters the Earth's atmosphere after 12 years in orbit.
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| |File:Pin Man.jpg|link=Pin Man|1985: [[Pin Man]] publishes his autobiography. He will quickly receive both praise and death threats.
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| File:Coxeter circles.png|link=Coxeter's loxodromic sequence of tangent circles (nonfiction)|1971: Mathematician and crime-fighter Harold Scott MacDonald Coxeter uses his famous [[Coxeter's loxodromic sequence of tangent circles (nonfiction)|loxodromic sequence of tangent circles]] to detect and prevent [[crimes against mathematical constants]].
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| ||Friedrich Hermann Hund (d. 31 March 1997) was a German physicist from Karlsruhe known for his work on atoms and molecules.
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| ||Lyman Strong Spitzer, Jr. (d. March 31, 1997) was an American theoretical physicist, astronomer and mountaineer. As a scientist, he carried out research into star formation, plasma physics, and in 1946, conceived the idea of telescopes operating in outer space. Spitzer invented the stellarator plasma device. Pic.
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| File:Clifford Shull 1949.jpg|link=Clifford Shull (nonfiction)|2001: Physicist and academic [[Clifford Shull (nonfiction)|Clifford Shull]] dies. He shared the 1994 Nobel Prize in Physics with Bertram Brockhouse for the development of the neutron scattering technique.
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| File:Harold Scott MacDonald Coxeter.jpg|link=Harold Scott MacDonald Coxeter (nonfiction)|2003: Mathematician and academic [[Harold Scott MacDonald Coxeter (nonfiction)|Harold Scott MacDonald Coxeter]] dies. He was one of the greatest geometers of the 20th century.
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| File:Halobaena caerulea in flight - SE Tasmania.jpg|link=Stomach Oil Exporting Petrels|2017: [[Stomach Oil Exporting Petrels|SOEP cartel]] threatens to shoot [[Stomach oil (nonfiction)|stomach oil smugglers]] on sight.
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