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| ||1617 – David Fabricius, German astronomer and theologian (b. 1564)
| | File:Gerard_van_Swieten_Kaiserbild.jpg|link=Gerard van Swieten (nonfiction)|1700: Physician [[Gerard van Swieten (nonfiction)|Gerard van Swieten]] born. |
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| ||1700 – Gerard van Swieten, Dutch-Austrian physician (d. 1772) Vampires
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| File:Antoine Lavoisier.jpg|link=Antoine Lavoisier (nonfiction)|1794: Chemist, aristocrat, and crime-fighter [[Antoine Lavoisier (nonfiction)|Antoine Lavoisier]] publishes his groundbreaking treatise on [[crimes against chemical constants]], introducing nomenclature and terminology used to this day. | |
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| File:Supplice de 9 émigrés Octobre 1793.jpg|link=French Revolution (nonfiction)|1794: [[French Revolution (nonfiction)|French Revolution]]: Robespierre introduces the Cult of the Supreme Being in the National Convention as the new state religion of the French First Republic. | | File:Supplice de 9 émigrés Octobre 1793.jpg|link=French Revolution (nonfiction)|1794: [[French Revolution (nonfiction)|French Revolution]]: Robespierre introduces the Cult of the Supreme Being in the National Convention as the new state religion of the French First Republic. |
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| ||Otto Wilhelm von Struve (b. May 7, 1819) was a Russian astronomer. Together with his father, Friedrich Georg Wilhelm von Struve, Otto Wilhelm von Struve is considered a prominent 19th century astronomer who headed the Pulkovo Observatory between 1862 and 1889 and was a leading member of the Russian Academy of Sciences. Pic.
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| ||Joseph Thomas Clover (baptized 7 May 1825) was an English 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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| File:Carl Gottfried Neumann.jpg|link=Carl Gottfried Neumann (nonfiction)|1832: Mathematician [[Carl Gottfried Neumann (nonfiction)|Carl Gottfried Neumann]] born. He will study physics with his father, and later work as a mathematician, dealing almost exclusively with problems arising from physics.
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| ||Pietro Abbati Marescotti (d. 1842) was an Italian mathematician
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| ||Carl Gustav Axel von Harnack (b. 7 May 1851) was a German mathematician who contributed to potential theory. Harnack's inequality applied to harmonic functions. He also worked on the real algebraic geometry of plane curves, proving Harnack's curve theorem for real plane algebraic curves.
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| ||Giuseppe Veronese (d. 7 May 1854) was an Italian mathematician.
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| File:Oliver Blackburn Shallenberger.jpg|link=Oliver B. Shallenberger (nonfiction)|1860: Electrical engineer and inventor [[Oliver B. Shallenberger (nonfiction)|Oliver Blackburn Shallenberger]] born. He will invent the first successful alternating current electrical meter, which will be critical to the general acceptance of AC power. | | File:Oliver Blackburn Shallenberger.jpg|link=Oliver B. Shallenberger (nonfiction)|1860: Electrical engineer and inventor [[Oliver B. Shallenberger (nonfiction)|Oliver Blackburn Shallenberger]] born. He will invent the first successful alternating current electrical meter, which will be critical to the general acceptance of AC power. |
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| |File:Niles Cartouchian 2.jpg|link=Niles Cartouchian (1900s)|1868: Actor, cryptographer, and alleged time-traveller [[Niles Cartouchian (1900s)|Niles Cartouchian]] stops the [[Forbidden Ratio]] gang from kidnapping the new.
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| ||File:Wilhelm Röntgen.jpg|link=Wilhelm Röntgen (nonfiction)|1871: Engineer and physicist [[Wilhelm Röntgen (nonfiction)|Wilhelm Röntgen]] uses [[scrying engine]] techniques to expose [[Loaded dice (nonfiction)|loaded dice]].
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| ||Oskar Perron (b. 7 May 1880) was a German mathematician. He made numerous contributions to differential equations and partial differential equations, including the Perron method to solve the Dirichlet problem for elliptic partial differential equations. Pic.
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| ||1890: James Nasmyth dies ... engineer who invented the steam-hammer (24 Nov 1839) which was patented in Britain on 9 Jun 1842 (No. 9382). In his early career, Nasmyth improved the design of machine tools. Power hammers had previously been driven by steam, but Nasmyth designed his steam-hammer with more precision and control. The steam functioned to lift the hammer which then dropped by gravity, and repeated the cycle. Nasmyth adapted the idea to make a steam pile-driver. With later improvements, the steam-hammer enabled forging very large guns for the British navy. He became wealthy and in 1856 was able to retire at the age of 48. After retirement, Nasmyth pursued his hobby of astronomy, in which he published minor works. Pic.
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| File:Alexander Stepanovich Popov.jpg|link=Alexander Stepanovich Popov (nonfiction)|1895: Russian physicist [[Alexander Stepanovich Popov (nonfiction)|Alexander Stepanovich Popov]] demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector — a primitive radio receiver. | | File:Alexander Stepanovich Popov.jpg|link=Alexander Stepanovich Popov (nonfiction)|1895: Russian physicist [[Alexander Stepanovich Popov (nonfiction)|Alexander Stepanovich Popov]] demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector — a primitive radio receiver. |
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| File:Havelock.jpg|link=John Havelock|1895: Mathematician and alleged immortal [[John Havelock]] purchases signed first edition of ''[[Time machine (nonfiction)|The Time Machine]]'', telling author H. G. Wells that the book "is an instant classic."
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| File:The Time Machine by H.G. Wells (1895).jpg|link=Time machine (nonfiction)|1895: First publication of ''[[Time machine (nonfiction)|The Time Machine]]'' by H. G. Wells. | | File:The Time Machine by H.G. Wells (1895).jpg|link=Time machine (nonfiction)|1895: First publication of ''[[Time machine (nonfiction)|The Time Machine]]'' by H. G. Wells. |
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| ||Pavel Sergeyevich Alexandrov (b. 7 May 1896), was a Soviet mathematician. He wrote about three hundred papers, making important contributions to set theory and topology.
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| File:H. H. Holmes.jpg|link=H. H. Holmes (nonfiction)|1896: Serial killer [[H. H. Holmes (nonfiction)|H. H. Holmes]] is executed for the murder of his friend and accomplice Benjamin Pitezel.
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| ||Theodor Schneider (b. 7 May 1911) was a German mathematician, best known for providing proof of what is now known as the Gelfond–Schneider theorem. Schneider studied from 1929 to 34 in Frankfurt; he solved Hilbert's 7th problem in his PhD thesis, which then came to be known as the Gelfond–Schneider theorem.
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| ||1913 – Simon Ramo, American physicist and engineer (d. 2016)
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| ||1915 – World War I: German submarine U-20 sinks RMS Lusitania, killing 1,198 people, including 128 Americans. Public reaction to the sinking turns many formerly pro-Germans in the United States against the German Empire
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| ||1925 – Lauri Vaska, Estonian-American chemist and academic (d. 2015)
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| ||1928 – The Jinan incident begins with Japanese forces killing the Chinese negotiating team in Jinan, China, and going on to kill over 2,000 Chinese civilians in the following days.
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| ||1952 – The concept of the integrated circuit, the basis for all modern computers, is first published by Geoffrey Dummer.
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| File:Egon Rhodomunde.jpg|link=Egon Rhodomunde|1960: Film director and arms dealer [[Egon Rhodomunde]] raises funds for new film about the American U-2 pilot [[Francis Gary Powers (nonfiction)|Gary Powers]].
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| File:Gary Powers.jpg|link=Francis Gary Powers (nonfiction)|1960: Cold War: U-2 Crisis of 1960: Soviet leader Nikita Khrushchev announces that his nation is holding American U-2 pilot [[Francis Gary Powers (nonfiction)|Gary Powers]]. | | File:Gary Powers.jpg|link=Francis Gary Powers (nonfiction)|1960: Cold War: U-2 Crisis of 1960: Soviet leader Nikita Khrushchev announces that his nation is holding American U-2 pilot [[Francis Gary Powers (nonfiction)|Gary Powers]]. |
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| File:Dard Hunter, Glyph Warden detail.jpg|link=Niles Cartouchian (1900s)|1960: Actor-cryptographer [[Niles Cartouchian (1900s)|Niles Cartouchian]] meets privately with Nikita Khrushchev and [[Francis Gary Powers (nonfiction)|Gary Powers]] in a successful attempt to avoid nuclear war.
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| ||Hermann Lorenz Künneth (d. May 7, 1975 Erlangen) was a German mathematician and renowned algebraic topologist, best known for his contribution to what is now known as the Künneth theorem.
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| ||1992 – The Space Shuttle Endeavour is launched on its first mission, STS-49.
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| ||1994 – Edvard Munch's iconic painting The Scream is recovered undamaged after being stolen from the National Gallery of Norway in February.
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| ||2011 – Willard Boyle, Canadian physicist and academic, Nobel Prize laureate (b. 1924)
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| ||2014 – Colin Pillinger, English astronomer, chemist, and academic (b. 1943)
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| ||Sir Samuel Frederick Edwards FLSW FRS (d. 7 May 2015), "universally known as 'Sam'," was a Welsh physicist. Pic.
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| ||Elon Lages Lima (d. May 7, 2017) was a Brazilian mathematician whose research concerned differential topology, algebraic topology, and differential geometry. Lima was an influential figure in the development of mathematics in Brazil.
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| File:Three Kings.jpg|link=Three Kings (nonfiction)|2018: ''[[Three Kings (nonfiction)|Three Kings]]'' declared Picture of the Day by the citizens of [[New Minneapolis, Canada]].
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