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| ||217 – Roman Emperor Caracalla is assassinated. He is succeeded by his Praetorian Guard prefect, Marcus Opellius Macrinus.
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| File:Theoricarum by Peuerbach 1915.png|link=Georg von Peuerbach (nonfiction)|1461: Mathematician and astronomer [[Georg von Peuerbach (nonfiction)]] dies. He is remembered for his streamlined presentation of Ptolemaic astronomy in the ''Theoricae Novae Planetarum''. | | File:Michele_Mercati_by_Petrus_Nellus.jpg|link=Michele Mercati (nonfiction)|1541: Physician and archaeologist [[Michele Mercati (nonfiction)|Michele Mercati]] born. Mercati will be one of the first scholars to recognize prehistoric stone tools as human-made rather than natural or mythologically created thunderstones. |
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| File:Johannes Trithemius.jpg|link=Johannes Trithemius (nonfiction)|1484: Polymath [[Johannes Trithemius (nonfiction)|Johannes Trithemius]] publishes ''Chronicles of an Occult Cryptographer'', for which he will win a posthumous Pulitzer Prize. | | File:David Rittenhouse by Charles Wilson Peale.jpg|link=David Rittenhouse (nonfiction)|link=David Rittenhouse (nonfiction)|1732: Inventor, astronomer, mathematician, clockmaker, and surveyor [[David Rittenhouse (nonfiction)|David Rittenhouse]] born. Rittenhouse will become the first Director of the United States Mint, hand-striking the new nation's first coins. |
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| File:Michele_Mercati_by_Petrus_Nellus.jpg|link=Michele Mercati (nonfiction)|1541: Physician and archaeologist [[Michele Mercati (nonfiction)|Michele Mercati]] born. He will be one of the first scholars to recognize prehistoric stone tools as human-made rather than natural or mythologically created thunderstones. | | File:Du_calcul_des_derivations_(1800)_by_Louis_François_Antoine_Arbogast.png|link=Louis François Antoine Arbogast (nonfiction)|1803: Mathematician [[Louis François Antoine Arbogast (nonfiction)|Louis François Antoine Arbogast]] dies. Arbogast was the first writer to separate the symbols of operation from those of quantity. He wrote on series and the derivatives known by his name. |
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| File:Johannes Schöner.jpg|link=Johannes Schöner (nonfiction)|1542: [[Johannes Schöner (nonfiction)|Johannes Schöner]] publishes ''Confessions of an Occult Cosmographer'', for which he will posthumously win the Nobel Prize for Literature. | | File:Marhall Harvey Stone Zurich 1932.jpg|link=Marshall Harvey Stone (nonfiction)|1903: Mathematician [[Marshall Harvey Stone (nonfiction)|Marshall Harvey Stone]] born. Stone will contribute to real analysis, functional analysis, topology, and the study of Boolean algebra structures. |
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| File:David Rittenhouse by Charles Wilson Peale.jpg|link=David Rittenhouse (nonfiction)|link=David Rittenhouse (nonfiction)|1732: Inventor, astronomer, mathematician, clockmaker, and surveyor [[David Rittenhouse (nonfiction)|David Rittenhouse]] born. He will become the first Director of the United States Mint, hand-striking the new nation's first coins.
| | File:Heike Kamerlingh Onnes.jpg|link=Heike Kamerlingh Onnes (nonfiction)|1911: Physicist [[Heike Kamerlingh Onnes (nonfiction)|Heike Kamerlingh Onnes]], discoverer of superconductivity, makes a terse entry in his notebook: ''Kwik nagenoeg nul'' ("Mercury[’s resistance] practically zero [at 3 K]."). |
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| ||Pierre Prévost (d. 8 April 1839) was a Genevan philosopher and physicist. In 1791 he explained Pictet's experiment by arguing that all bodies radiate heat, no matter how hot or cold they are. Pic.
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| ||Johann Salomo Christoph Schweigger (b. 1779) was a German chemist, physicist, and professor of mathematics
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| ||Charles-Édouard Brown-Séquard FRS (b. 1817), also known as Charles Edward, was a Mauritian physiologist and neurologist who, in 1850, became the first to describe what is now called Brown-Séquard syndrome.
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| ||1818 – August Wilhelm von Hofmann, German chemist and academic (d. 1892)
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| ||1820 – The Venus de Milo is discovered on the Aegean island of Milos.
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| File:Havelock.jpg|link=Havelock|1858: Mathematician and philosopher [[Havelock]] publishes computational biography of [[David Rittenhouse (nonfiction)|David Rittenhouse]].
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| File:Edmund Husserl 1910s.jpg|link=Edmund Husserl (nonfiction)|1859: Mathematician and philosopher [[Edmund Husserl (nonfiction)|Edmund Husserl]] born. He will argue that transcendental consciousness sets the limits of all possible knowledge.
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| File:Marhall Harvey Stone Zurich 1932.jpg|link=Marshall Harvey Stone (nonfiction)|1903: Mathematician [[Marshall Harvey Stone (nonfiction)|Marshall Harvey Stone]] born. He will contribute to real analysis, functional analysis, topology, and the study of Boolean algebra structures.
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| ||Aurel Friedrich Wintner (b. 8 April 1903) was a mathematician noted for his research in mathematical analysis, number theory, differential equations and probability theory. He was one of the founders of probabilistic number theory. Pic.
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| File:Aleister Crowley.jpg|link=Aleister Crowley (nonfiction)|1904: British mystic [[Aleister Crowley (nonfiction)|Aleister Crowley]] transcribes the first chapter of The Book of the Law.
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| File:Kinetoscope.jpg|link=Kinetoscope (nonfiction)|1910: [[Kinetoscope (nonfiction)|Kinetoscope]] used in series of [[math crimes]], authorities name [[Skip Digits]] as person of interest.
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| File:Heike Kamerlingh Onnes.jpg|link=Heike Kamerlingh Onnes (nonfiction)|1911: Physicist [[Heike Kamerlingh Onnes (nonfiction)|Heike Kamerlingh Onnes]] discovers superconductivity. | |
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| ||Melvin Ellis Calvin (b. April 8, 1911) was an American biochemist most famed for discovering the Calvin cycle along with Andrew Benson and James Bassham, for which he was awarded the 1961 Nobel Prize in Chemistry.
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| ||Gyula Kőnig (d. 8 April 1913) was a Hungarian mathematician. Pic.
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| File:Ernst_Ruhmer,_Technical_World_cover_(1905).jpg|link=Ernst Ruhmer (nonfiction)|1878: Physicist [[Ernst Ruhmer (nonfiction)|Ernst Ruhmer]] dies. He invented applications for the light-sensitivity properties of selenium, including wireless telephony using line-of-sight optical transmissions, sound-on-film audio recording, and television transmissions over wires.
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| ||1917 – Winifred Asprey, American mathematician and computer scientist (d. 2007)
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| ||1919 – Loránd Eötvös, Hungarian physicist, academic, and politician, Hungarian Minister of Education (b. 1848)
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| ||1923 – George Fisher, American cartoonist (d. 2003)
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| ||Karl Heinrich Emil Becker (d. 8 April 1940 in Berlin) was a German weapons engineer and artillery general. He advocated and implemented close ties of the military to science for purposes of advanced weapons development.
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| ||1943 – U.S. President Franklin D. Roosevelt, in an attempt to check inflation, freezes wages and prices, prohibits workers from changing jobs unless the war effort would be aided thereby, and bars rate increases by common carriers and public utilities.
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| ||1943: Otto and Elise Hampel are executed in Berlin for their anti-Nazi activities
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| ||1946 – Électricité de France, the world's largest utility company, is formed as a result of the nationalisation of a number of electricity producers, transporters and distributors.
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| ||1959 – A team of computer manufacturers, users, and university people led by Grace Hopper meets to discuss the creation of a new programming language that would be called COBOL.
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| ||1964 – The Gemini 1 test flight is conducted.
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| ||1969 – Zinaida Aksentyeva, Ukrainian astronomer (b. 1900)
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| ||1984 – Pyotr Kapitsa, Russian physicist and academic, Nobel Prize laureate (b. 1894)
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| ||1992 – Daniel Bovet, Swiss-Italian pharmacologist and academic, Nobel Prize laureate (b. 1907)
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| File:Rhizolith Group.jpg|link=Rhizolith Group|2001: New Minneapolis-based dance company [[Rhizolith Group]] announces world tour.
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| File:Donald Sarason 2003.jpg|link=Donald Sarason (nonfiction)|2017: Mathematician [[Donald Sarason (nonfiction)|Donald Erik Sarason]] dies. He made fundamental advances in the areas of Hardy space theory and Vanishing mean oscillation (VMO).
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| </gallery> | | </gallery> |
![1911: Physicist Heike Kamerlingh Onnes, discoverer of superconductivity, makes a terse entry in his notebook: Kwik nagenoeg nul ("Mercury[’s resistance] practically zero [at 3 K].").](/w/images/thumb/8/84/Heike_Kamerlingh_Onnes.jpg/87px-Heike_Kamerlingh_Onnes.jpg)