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| ||1541: Celio Calcagnini dies ... astronomer. Pic: book cover.
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| ||1620: John Graunt born ... demographer and statistician. Pic.
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| File:Thomas Fincke.jpg|link=Thomas Fincke (nonfiction)|1656: Mathematician and physicist [[Thomas Fincke (nonfiction)|Thomas Fincke]] dies. He introduced the modern names of the trigonometric functions tangent and secant. | | File:Thomas Fincke.jpg|link=Thomas Fincke (nonfiction)|1656: Mathematician and physicist [[Thomas Fincke (nonfiction)|Thomas Fincke]] dies. He introduced the modern names of the trigonometric functions tangent and secant. |
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| ||Robert-Aglaé Cauchoix born ... optician and instrument maker, whose lenses played a part in the race of the great refractor telescopes in the first half of the 19th century. Pic: observatory.
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| ||1879: Felix Ehrenhaft born ... physicist who contributed to atomic physics, to the measurement of electrical charges and to the optical properties of metal colloids. He was known for his maverick and controversial style. Pic.
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| ||1880: Gideon Sundback born ... engineer and businessman, developed the zipper. Pic.
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| ||1885: American sharpshooter Annie Oakley is hired by Nate Salsbury to be a part of Buffalo Bill's Wild West. Pic.
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| ||1895: Joshua Slocum, the first person to sail single-handedly around the world, sets sail from Boston, Massachusetts aboard the sloop "Spray". Pic.
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| ||1897: Benjamin Lee Whorf born ... linguist, anthropologist, and engineer. Pic.
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| ||1899: Oscar Zariski born ... mathematician and academic. Pic.
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| ||1911: Irene Sänger-Bredt born ... engineer, mathematician and physicist. She is co-credited with the design of a proposed intercontinental spaceplane/bomber Pic: https://www.sciencedirect.com/science/article/pii/S0094576504001298
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| ||1913: Dieter Grau born ... scientist and engineer. Peenemunde. Pic.
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| File:Franck Hertz Hg tube.jpg|link=Franck–Hertz experiment (nonfiction)|1914: The [[Franck–Hertz experiment (nonfiction)|Franck–Hertz experiment]], a pillar of quantum mechanics, is presented to the German Physical Society. | | File:Franck Hertz Hg tube.jpg|link=Franck–Hertz experiment (nonfiction)|1914: The [[Franck–Hertz experiment (nonfiction)|Franck–Hertz experiment]], a pillar of quantum mechanics, is presented to the German Physical Society. |
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| ||1919: David Blackwell born ... statistician and mathematician who made significant contributions to game theory, probability theory, information theory, and Bayesian statistics. He is one of the eponyms of the Rao–Blackwell theorem. Pic.
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| ||1919: Wolfgang K. H. Panofsky born ... physicist. Pic search.
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| ||1922: The first segment of the Imperial Wireless Chain providing wireless telegraphy between Leafield in Oxfordshire, England, and Cairo, Egypt, comes into operation.
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| ||1942: Leonid Kulik dies ... minerologist who conducted the first scientific expedition (for which records survive) to study the Tungusta meteor impact site. He began in 1927, and continued to work on the investigation until, while fighting for his country in WW II, he was captured and died of typhus in a Nazi prison camp. Pic.
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| ||1944: Georg Bredig dies ... physical chemist. Pic.
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| ||1944: Charles Jordan dies ... magician. Pic search.
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| ||1945: Ernst-Robert Grawitz dies ... physician.
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| ||1945: Larry Tesler born ... computer scientist who worked in the field of human–computer interaction. Tesler worked at Xerox PARC, Apple, Amazon, and Yahoo! While at PARC, Tesler's work included Smalltalk, the first dynamic object-oriented programming language, and Gypsy, the first word processor with a graphical user interface for the Xerox Alto. During this, along with colleague Tim Mott, Tesler developed the idea of copy and paste functionality and the idea of modeless software. While at Apple, Tesler worked on the Apple Lisa and the Apple Newton, and helped to develop Object Pascal and its use in application programming toolkits including MacApp. Pic.
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| ||1947: Roger D. Kornberg born ... biochemist and academic, Nobel Prize laureate. (Alive August 2018.)
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| ||1952: Hans Kramers dies ... physicist who worked with Niels Bohr to understand how electromagnetic waves interact with matter. Pic.
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| File:Soyuz 1 patch.png|link=Soyuz 1 (nonfiction)|1967: Cosmonaut Vladimir Komarov dies in [[Soyuz 1 (nonfiction)|Soyuz 1]] when its parachute fails to open. He is the first human to die during a space mission. | | File:Soyuz 1 patch.png|link=Soyuz 1 (nonfiction)|1967: Cosmonaut Vladimir Komarov dies in [[Soyuz 1 (nonfiction)|Soyuz 1]] when its parachute fails to open. He is the first human to die during a space mission. |
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| ||1960: Harold Frederick Pitcairn dies ... aviation inventor and pioneer. He played a key role in the development of the autogyro and founded the Autogiro Company of America. He patented a number of innovations relating to rotary wing aircraft. Pic.
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| ||1960: Max von Laue dies ... physicist and academic, Nobel Prize laureate.
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| ||1964: Gerhard Domagk dies ... pathologist and bacteriologist.
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| ||1967: Vladimir Mikhaylovich Komarov dies ... test pilot, aerospace engineer and cosmonaut. In October 1964, he commanded Voskhod 1, the first spaceflight to carry more than one crew member. He became the first cosmonaut to fly in space twice when he was selected as the solo pilot of Soyuz 1, the first manned test flight of a new spacecraft. A parachute failure caused his Soyuz capsule to crash into the ground after re-entry on 24 April 1967, making him the first human to die in a space flight. Pic.
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| ||1980: Eight U.S. servicemen die in Operation Eagle Claw as they attempt to end the Iran hostage crisis.
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| ||1990: STS-31: The Hubble Space Telescope is launched from the Space Shuttle Discovery.
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| ||1997: Eugene Stoner dies ... engineer, designed the AR-15 rifle. Pic.
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| ||2000: George Michael Volkoff dies ... physicist and academic who helped, with J. Robert Oppenheimer, predict the existence of neutron stars before they were discovered. Pic.
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| </gallery> | | </gallery> |
