Template:Selected anniversaries/October 21: Difference between revisions

Revision as of 18:55, 26 November 2019

1687: Mathematician and theorist Nicolaus I Bernoulli born. He will introduce a successful resolution to the St. Petersburg paradox.
1768: Astronomer and adventurer Guillaume Le Gentil publicly accuses the House of Malevecchio of crimes against astronomical constants. The Malvecchians will back down from the encounter, but later secretly punish Le Gentil by creating overcast conditions on June 4, 1769.
1914: Mathematics and science writer Martin Gardner born. His interests will include stage magic, scientific skepticism, philosophy, religion, and literature.
1958: National Pareidolia Day declared in the United States.
1969: Mathematician and academic Wacław Sierpiński dies. He made important contributions to set theory (research on the axiom of choice and the continuum hypothesis), number theory, theory of functions, and topology.
2017: Green Spiral 9 feels more green than ever, according to new chromatographic survey.

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 ||1961: First attempt at Project Ford West fails: the copper needles fail to disperse.
+||1967: Ejnar Hertzsprung dies ... chemist and astronomer, born in Copenhagen, Denmark. In the period 1911–1913, together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram. Pic.
 ||1967: The Soviet space probe Venera 4 became the first spacecraft to perform direct in situ analysis of the environment of another planet (Venus).
-||1967: Ejnar Hertzsprung dies ... chemist and astronomer, born in Copenhagen, Denmark. In the period 1911–1913, together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram. Pic.
+||1967: Flower Power is a photograph taken by American photographer Bernie Boston for the now-defunct The Washington Star newspaper. Taken on October 21, 1967, during the National Mobilization Committee to End the War in Vietnam's "March on The Pentagon", the photo shows a Vietnam War protester placing a carnation into the barrel of a rifle held by a soldier of the 503rd Military Police Battalion.
 File:Wacław Sierpiński.jpg|link=Wacław Sierpiński (nonfiction)|1969: Mathematician and academic [[Wacław Sierpiński (nonfiction)|Wacław Sierpiński]] dies. He made important contributions to set theory (research on the axiom of choice and the continuum hypothesis), number theory, theory of functions, and topology.