Template:Selected anniversaries/May 21: Difference between revisions
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||878: Syracuse, Sicily, is captured by the Muslim Aghlabids after a nine-month siege. | ||878: Syracuse, Sicily, is captured by the Muslim Aghlabids after a nine-month siege. | ||
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||1894: August Kundt dies ... physicist and academic. Pic. | ||1894: August Kundt dies ... physicist and academic. Pic. | ||
||1894: The Manchester Ship Canal in the United Kingdom is officially opened by Queen Victoria, who later knights its designer Sir Edward Leader Williams. | ||1894: The Manchester Ship Canal in the United Kingdom is officially opened by Queen Victoria, who later knights its designer Sir Edward Leader Williams. Pic. | ||
||1902: Herbert Grötzsch born ... mathematician. He was born in Döbeln and died in Halle. Grötzsch worked in graph theory. He was the discoverer and eponym of the Grötzsch graph, a triangle-free graph that requires four colors in any graph coloring, and Grötzsch's theorem, the result that every triangle-free planar graph requires at most three colors. Pic. | ||1902: Herbert Grötzsch born ... mathematician. He was born in Döbeln and died in Halle. Grötzsch worked in graph theory. He was the discoverer and eponym of the Grötzsch graph, a triangle-free graph that requires four colors in any graph coloring, and Grötzsch's theorem, the result that every triangle-free planar graph requires at most three colors. Pic. | ||
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||1964: James Franck dies ... physicist and academic, Nobel Prize laureate. Pic. | ||1964: James Franck dies ... physicist and academic, Nobel Prize laureate. Pic. | ||
||1965: Geoffrey de Havilland dies ... pilot and engineer, designed the de Havilland Mosquito. | ||1965: Geoffrey de Havilland dies ... pilot and engineer, designed the de Havilland Mosquito. Pic. | ||
||1971: Johannes Peter Letzmann dies ... meteorologist, and a pioneering tornado researcher. His prolific output related to severe storms concepts included: developing tornado damage studies, atmospheric vortices, theoretical studies and laboratory simulations, tornado case studies, and observation programs. It generated extensive analysis techniques and insights on tornadoes at a time when there was still very little research on the subject in the United States. Pic. | ||1971: Johannes Peter Letzmann dies ... meteorologist, and a pioneering tornado researcher. His prolific output related to severe storms concepts included: developing tornado damage studies, atmospheric vortices, theoretical studies and laboratory simulations, tornado case studies, and observation programs. It generated extensive analysis techniques and insights on tornadoes at a time when there was still very little research on the subject in the United States. Pic. | ||
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||1981: The Italian government releases the membership list of Propaganda Due, an illegal pseudo-Masonic lodge that was implicated in numerous Italian crimes and mysteries. | ||1981: The Italian government releases the membership list of Propaganda Due, an illegal pseudo-Masonic lodge that was implicated in numerous Italian crimes and mysteries. | ||
||1991: Former Indian Prime Minister Rajiv Gandhi is assassinated by a female suicide bomber near Madras. | ||1991: Former Indian Prime Minister Rajiv Gandhi is assassinated by a female suicide bomber near Madras. Pic. | ||
||2001: French Taubira law is enacted, officially recognizing the Atlantic slave trade and slavery as crimes against humanity. | ||2001: French Taubira law is enacted, officially recognizing the Atlantic slave trade and slavery as crimes against humanity. | ||
Revision as of 08:48, 21 May 2019
1471: Painter, engraver, and mathematician Albrecht Dürer born. Dürer will be regarded as the greatest German Renaissance artist: his vast body of work will include altarpieces and religious works, numerous portraits and self-portraits, and copper engravings.
1670: Astronomer and physicist Niccolò Zucchi dies. He published works on astronomy, optics, mechanics, and magnetism.
1859: Lawyer, translator, inventor, and APTO operative Per Georg Scheutz uses his Scheutzian calculation engine to defeat the Forbidden Ratio in single combat.
1923: Mathematician and academic Armand Borel born. He will work in algebraic topology, and in the theory of Lie groups, contributing to the creation of the contemporary theory of linear algebraic groups.
1927: Charles Lindbergh touches down at Le Bourget Field in Paris, completing the world's first solo nonstop flight across the Atlantic Ocean.
1927: Pilot, engineer, and alleged time-traveler Henrietta Bolt touches down at Le Bourget Field in Paris, completing the world's first solo nonstop round-the-world flight.
1932: Amelia Earhart completes her solo nonstop flight across the Atlantic when bad weather forces her to land in Derry, Northern Ireland, after a flight lasting 14 hours, 56 minutes. Earhart is the second person (after Charles Lindbergh) to fly nonstop and alone across the Atlantic.
1946: Physicist Louis Slotin is fatally irradiated in a criticality incident during an experiment with the so-called "demon core" at Los Alamos National Laboratory.
1953: Logician and mathematician Ernst Friedrich Ferdinand Zermelo dies. His work had major implications for the foundations of mathematics; he is known for his role in developing Zermelo–Fraenkel axiomatic set theory, and for his proof of the well-ordering theorem.
2016: Wheel of Fire 2 is voted Picture of the Day by the citizens of New Minneapolis, Canada.