Template:Selected anniversaries/April 30: Difference between revisions
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||1912: The final leg of the Madeira-Mamoré Railway ("Devils Rail-Road") was inaugurated in Brazil. https://en.wikipedia.org/wiki/Madeira-Mamor%C3%A9_Railroad | ||1912: The final leg of the Madeira-Mamoré Railway ("Devils Rail-Road") was inaugurated in Brazil. https://en.wikipedia.org/wiki/Madeira-Mamor%C3%A9_Railroad | ||
File:Genevieve_Grotjan_Feinstein.jpg|link=Genevieve Grotjan Feinstein (nonfiction)|1913: Mathematician and cryptanalyst [[Genevieve Grotjan Feinstein (nonfiction)|Genevieve Grotjan Feinstein]] born. Feinstein will work for the Signals Intelligence Service throughout World War II, playing an important role in deciphering the Japanese cryptography machine Purple, and will later work on the Cold War-era Venona project. | File:Genevieve_Grotjan_Feinstein.jpg|link=Genevieve Grotjan Feinstein (nonfiction)|1913: Mathematician and cryptanalyst [[Genevieve Grotjan Feinstein (nonfiction)|Genevieve Grotjan Feinstein]] born. Feinstein will work for the Signals Intelligence Service throughout World War II, playing an important role in deciphering the Japanese cryptography machine Purple, and will later work on the Cold War-era Venona project. | ||
File:Claude Shannon.jpg|link=Claude Shannon (nonfiction)|1916: Mathematician, engineer, and information scientist [[Claude Shannon (nonfiction)|Claude Shannon]] born. He will be known as "the father of information theory". | File:Claude Shannon.jpg|link=Claude Shannon (nonfiction)|1916: Mathematician, engineer, and information scientist [[Claude Shannon (nonfiction)|Claude Shannon]] born. He will be known as "the father of information theory". | ||
||1920: Gerda Lerner born ... historian and author. Pic. | ||1920: Gerda Lerner born ... historian and author. Pic. | ||
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||1961: K-19, the first Soviet nuclear submarine equipped with nuclear missiles, is commissioned. | ||1961: K-19, the first Soviet nuclear submarine equipped with nuclear missiles, is commissioned. | ||
File:Nixon April-29-1974.jpg|link=Watergate scandal (nonfiction)|1973: [[Watergate scandal (nonfiction)|Watergate]]: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned. | File:Nixon April-29-1974.jpg|link=Watergate scandal (nonfiction)|1973: [[Watergate scandal (nonfiction)|Watergate]]: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned. | ||
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||2011: Daniel Quillen dies ... mathematician. He is known for being the "prime architect" of higher algebraic K-theory, for which he was awarded the Cole Prize in 1975 and the Fields Medal in 1978. Pic: https://ronsview.org/2011/05/10/daniel-quillen/ | ||2011: Daniel Quillen dies ... mathematician. He is known for being the "prime architect" of higher algebraic K-theory, for which he was awarded the Cole Prize in 1975 and the Fields Medal in 1978. Pic: https://ronsview.org/2011/05/10/daniel-quillen/ | ||
||2016: Sir Harold Walter Kroto FRS dies ... chemist. He shared the 1996 Nobel Prize in Chemistry with Robert Curl and Richard Smalley for their discovery of fullerenes. Pic. | ||2016: Sir Harold Walter Kroto FRS dies ... chemist. He shared the 1996 Nobel Prize in Chemistry with Robert Curl and Richard Smalley for their discovery of fullerenes. Pic. | ||
Revision as of 22:48, 26 January 2022
1777: Mathematician, astronomer, and physicist Carl Friedrich Gauss born. He will have an exceptional influence in many fields of mathematics and science and be ranked as one of history's most influential mathematicians.
1897: J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
1913: Mathematician and cryptanalyst Genevieve Grotjan Feinstein born. Feinstein will work for the Signals Intelligence Service throughout World War II, playing an important role in deciphering the Japanese cryptography machine Purple, and will later work on the Cold War-era Venona project.
1916: Mathematician, engineer, and information scientist Claude Shannon born. He will be known as "the father of information theory".
1973: Watergate: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned.