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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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| ||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: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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| ||1847 – Yegor Ivanovich Zolotarev, Russian mathematician and theorist (d. 1878) Yegor (Egor) Ivanovich Zolotarev (Russian: Его́р Ива́нович Золотарёв) (March 31, 1847, Saint Petersburg – July 19, 1878, Saint Petersburg) was a Russian mathematician. | | 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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| File:USS Cairo.jpg|link=USS Cairo (nonfiction)|1861: [[USS Cairo (nonfiction)|USS Cairo]] retrofitted with military [[scrying engine]] device. | | 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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| ||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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| ||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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