Template:Selected anniversaries/April 20: Difference between revisions
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File: | File:Curie_and_radium_by_Castaigne.jpg|link=Radium (nonfiction)|1902: Pierre and Marie Curie refine [[Radium (nonfiction)|radium chloride]]. | ||
File:Karl Ferdinand Braun.jpg|link=Karl Ferdinand Braun (nonfiction)|1918: Physicist and academic [[Karl Ferdinand Braun (nonfiction)|Karl Ferdinand Braun]] dies. Braun contributed significantly to the development of radio and television technology, sharing the 1909 Nobel Prize in Physics with [[Guglielmo Marconi (nonfiction)|Guglielmo Marconi]] "for their contributions to the development of wireless telegraphy". | |||
File:Giuseppe Peano.jpg|link=Giuseppe Peano (nonfiction)|1932: Mathematician [[Giuseppe Peano (nonfiction)|Giuseppe Peano]] dies. He did pioneering work in mathematical logic and [[Set theory (nonfiction)|set theory]]. | |||
File:Georg_Feigl.jpg|link=Georg Feigl (nonfiction)|1945: Mathematician [[Georg Feigl (nonfiction)|Georg Feigl]] dies. He worked on the foundations of geometry and topology, studying fixed point theorems for ''n''-dimensional manifolds. Feigl was one of the initial authors of the ''Mathematisches Wörterbuch''. | |||
File:Bay of Pigs.jpg|link=Bay of Pigs Invasion (nonfiction)|1961: Failure of the [[Bay of Pigs Invasion (nonfiction)|Bay of Pigs Invasion]] of US-backed Cuban exiles against Cuba. | |||
File:Clandestiphrine proposal.jpg|link=Clandestiphrine|1962: Traces of [[Clandestiphrine]] residue are detected at the [[Bay of Pigs Invasion (nonfiction)|Bay of Pigs]], raising questions about CIA involvement with [[transdimensional drugs]]. | |||
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Latest revision as of 04:59, 21 April 2022
1902: Pierre and Marie Curie refine radium chloride.
1918: Physicist and academic Karl Ferdinand Braun dies. Braun contributed significantly to the development of radio and television technology, sharing the 1909 Nobel Prize in Physics with Guglielmo Marconi "for their contributions to the development of wireless telegraphy".
1932: Mathematician Giuseppe Peano dies. He did pioneering work in mathematical logic and set theory.
1945: Mathematician Georg Feigl dies. He worked on the foundations of geometry and topology, studying fixed point theorems for n-dimensional manifolds. Feigl was one of the initial authors of the Mathematisches Wörterbuch.
1961: Failure of the Bay of Pigs Invasion of US-backed Cuban exiles against Cuba.
1962: Traces of Clandestiphrine residue are detected at the Bay of Pigs, raising questions about CIA involvement with transdimensional drugs.