Template:Selected anniversaries/August 20: Difference between revisions
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||1858: Charles Darwin first publishes his theory of evolution through natural selection in The Journal of the Proceedings of the Linnean Society of London, alongside Alfred Russel Wallace's same theory. | ||1858: Charles Darwin first publishes his theory of evolution through natural selection in The Journal of the Proceedings of the Linnean Society of London, alongside Alfred Russel Wallace's same theory. | ||
||1863: Corrado Segre born ... mathematician who is remembered today as a major contributor to the early development of algebraic geometry. | ||1863: Corrado Segre born ... mathematician who is remembered today as a major contributor to the early development of algebraic geometry. Pic. | ||
||1872: William Robinson was issued a U.S. patent No.130,661 for electric train signalling. | ||1872: William Robinson was issued a U.S. patent No.130,661 for electric train signalling. | ||
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||1897: Physician Sir Ronald Ross made a key breakthrough when he discovered malaria parasites while dissecting a mosquito. This day is now known as World Mosquito Day, in celebration of this important discovery. | ||1897: Physician Sir Ronald Ross made a key breakthrough when he discovered malaria parasites while dissecting a mosquito. This day is now known as World Mosquito Day, in celebration of this important discovery. | ||
||1898: Theoretical physicist Leopold Infeld born. After the first use of nuclear weapons in 1945 Infeld, like Einstein, became a peace activist. Because of his activities, he was unjustly accused of having communist sympathies. In the strongly anti-communist climate of the time many in the Canadian government and media feared that Infled would betray nuclear weapons secrets. He was stripped of his Canadian citizenship and was widely denounced as a traitor. In actuality, Infeld's field was the theory of relativity—not directly linked to nuclear weapons research. | ||1898: Theoretical physicist Leopold Infeld born. After the first use of nuclear weapons in 1945 Infeld, like Einstein, became a peace activist. Because of his activities, he was unjustly accused of having communist sympathies. In the strongly anti-communist climate of the time many in the Canadian government and media feared that Infled would betray nuclear weapons secrets. He was stripped of his Canadian citizenship and was widely denounced as a traitor. In actuality, Infeld's field was the theory of relativity—not directly linked to nuclear weapons research. Pic. | ||
||1899: Salomon Bochner born ... mathematician, known for work in mathematical analysis, probability theory and differential geometry. Pic. | ||1899: Salomon Bochner born ... mathematician, known for work in mathematical analysis, probability theory and differential geometry. Pic. | ||
Revision as of 11:11, 19 February 2019
1672: Mathematician and politician Johan de Witt dies in a riot. The rioters will partially eat his body.
1911: The first cable message sent around the world from the U.S. by commercial telegraph was transmitted from New York City. It read “This message sent around the world,” left the New York Times building at 7:00 pm and was received at 7:16 pm after travelling nearly 29,000 miles through 16 relays via the Azores, Gibraltar, India, Phillipines, Midway, Guam, Hawaii and San Francisco.
1912: Thomas Edison receives U.S. patent No. 1036470 for a “Phonographic Apparatus,” and No. 1036471 for a “Storage Battery.”
1923: Miniaturized version of John Ambrose Fleming delivers lecture from within Fleming tube.
1942: The first visible quantity of a plutonium compound, plutonium(IV) iodate, is isolated by nuclear chemists Burris Cunningham and Louis Werner.
1961: Physicist and academic Percy Williams Bridgman dies. He won the 1946 Nobel Prize in Physics for his work on the physics of high pressures.
1962: Mathematician and crime-fighter Alice Beta publishes new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.