Template:Selected anniversaries/May 21: Difference between revisions

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File:Ernst Zermelo 1900s.jpg|link=Ernst Zermelo (nonfiction)|1953: Logician and mathematician [[Ernst Zermelo (nonfiction)|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.
File:Ernst Zermelo 1900s.jpg|link=Ernst Zermelo (nonfiction)|1953: Logician and mathematician [[Ernst Zermelo (nonfiction)|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.


||1919: Léon Alfred Nicolas Valentin dies - adventurer, who attempted to achieve human flight using bird-like wings. Léo Valentin is widely considered to be the most famous "birdman" of all time. He was billed as "Valentin, the Most Daring Man in the World". Pic.
||1919: Léon Alfred Nicolas Valentin dies - adventurer, who attempted to achieve human flight using bird-like wings. Léo Valentin is widely considered to be the most famous "birdman" of all time. He was billed as "Valentin, the Most Daring Man in the World". Valentin was at a Whit Monday air show in Liverpool before 100,000 spectators (including Beatles Paul McCartney and George Harrison,[9] as well as three-year-old Clive Barker, who would later reference Valentin in his work), using wings similar to the wooden ones that had brought him success in the past, but longer and more aerodynamic. However, the stunt immediately went wrong.[8][10] When exiting the plane, one of Valentin's wings made contact and a piece broke away. He attempted to land safely using a parachute, but that also failed, and he died immediately upon hitting the ground. Pic.  


||1964: James Franck dies ... physicist and academic, Nobel Prize laureate. Pic.
||1964: James Franck dies ... physicist and academic, Nobel Prize laureate. Pic.

Revision as of 09:11, 15 February 2022