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| ||1684 – Edme Mariotte, French physicist and priest (b. 1620)
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| ||Charles Mason (April 1728 [baptised 1 May]) was an English astronomer who made significant contributions to 18th-century science and American history, particularly through his involvement with the survey of the Mason–Dixon line
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| ||1748 – Thomas Lowndes, English astronomer and academic (b. 1692)
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| ||1803 – Justus von Liebig, German chemist and academic (d. 1873)
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| File:Johann Jakob Balmer.jpg|link=Johann Jakob Balmer (nonfiction)|1825: Mathematician and physicist [[Johann Jakob Balmer (nonfiction)|Johann Jakob Balmer]] born. He will develop an empirical formula for the visible spectral lines of the hydrogen atom. | | File:Johann Jakob Balmer.jpg|link=Johann Jakob Balmer (nonfiction)|1825: Mathematician and physicist [[Johann Jakob Balmer (nonfiction)|Johann Jakob Balmer]] born. He will develop an empirical formula for the visible spectral lines of the hydrogen atom. |
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| ||1856 – Jacques Philippe Marie Binet, French mathematician, physicist, and astronomer (b. 1786)
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| ||John Walker (d. 1 May 1859) invented the friction match.
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| ||Gabriel Lamé (1 May 1870) was a French mathematician who contributed to the theory of partial differential equations by the use of curvilinear coordinates, and the mathematical theory of elasticity.
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| ||1878 – Anselme Payen, French chemist and academic (b. 1795)
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| ||Eduard Schönfeld (d. May 1, 1891) was a German astronomer.
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| File:Herman_Hollerith.jpg|link=Herman Hollerith (nonfiction)|1891: Inventor [[Herman Hollerith (nonfiction)|Herman Hollerith]] uses census data to predict and prevent [[crimes against mathematical constants]].
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| ||1895 – William Giauque, Canadian-American chemist and academic, Nobel Prize laureate (d. 1982)
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| ||Henry DeWolf "Harry" Smyth (b. May 1, 1898) was an American physicist, diplomat, and bureaucrat. He played a number of key roles in the early development of nuclear energy, as a participant in the Manhattan Project, a member of the U.S. Atomic Energy Commission (AEC), and U.S. ambassador to the International Atomic Energy Agency (IAEA).
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| ||1910 – Dorothy Hodgkin, English biochemist, crystallographer, and academic, Nobel Prize laureate (d. 1994)
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| ||1915 – Tony Strobl, American comics artist and animator (d. 1991)
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| ||1918 – Julius Rosenberg, American spy (d. 1953)
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| ||1924 – Alexander Esenin-Volpin, Russian-American mathematician and poet (d. 2016)
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| ||1926 – The Italian-built airship Norge becomes the first vessel to fly over the North Pole.
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| ||1941 – Konrad Zuse presents the Z3, the world's first working programmable, fully automatic computer, in Berlin.
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| ||1942 – World War II: The U.S. tanker SS Virginia is torpedoed in the mouth of the Mississippi River by the German submarine U-507.
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| ||1942 – Dragoljub Velimirović, Serbian chess player and theoretician (d. 2014)
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| ||Jacob David Bekenstein (b. May 1, 1947) was a Mexico-born Israeli-American theoretical physicist who made fundamental contributions to the foundation of black hole thermodynamics and to other aspects of the connections between information and gravitation.
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| File:Gary Powers.jpg|link=Francis Gary Powers (nonfiction)|1960: Cold War: U-2 incident: [[Francis Gary Powers (nonfiction)|Francis Gary Powers]], in a Lockheed U-2 spyplane, is shot down over the Soviet Union, sparking a diplomatic crisis. | | File:Gary Powers.jpg|link=Francis Gary Powers (nonfiction)|1960: Cold War: U-2 incident: [[Francis Gary Powers (nonfiction)|Francis Gary Powers]], in a Lockheed U-2 spyplane, is shot down over the Soviet Union, sparking a diplomatic crisis. |
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| File:Asclepius Myrmidon in Advanced Test Reactor.jpg|link=Asclepius Myrmidon|1961: Scientist and combat surgeon [[Asclepius Myrmidon]] warns that U-2 incident may have released a new class of [[crimes against mathematical constants]].
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| |link=Béryl incident (nonfiction)|The [[Béryl incident (nonfiction)|Béryl incident]] was a French nuclear test, conducted on May 1, 1962, during which nine soldiers of the 621st Groupe d'Armes Spéciales unit were heavily contaminated by radioactivity.
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| ||1965 – The Soviet spacecraft Luna 5 crashes on the Moon.
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| File:Ralph Hartley.jpg|link=Ralph Hartley (nonfiction)|1970: Electronics researcher [[Ralph Hartley (nonfiction)|Ralph Hartley]] dies. He invented the Hartley oscillator and the Hartley transform, and contributed to the foundations of information theory. | | File:Ralph Hartley.jpg|link=Ralph Hartley (nonfiction)|1970: Electronics researcher [[Ralph Hartley (nonfiction)|Ralph Hartley]] dies. He invented the Hartley oscillator and the Hartley transform, and contributed to the foundations of information theory. |
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| ||2001 – Alexei Tupolev, Russian engineer, designed the Tupolev Tu-144 (b. 1925)
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| ||2017 – A ransomware attack attacks over 400 thousand computers worldwide, targeting computers of the UK'S National Health Services and Telefónica computers.
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