1946 physicist louis slotin is fatally irradiated in a criticalit 05 21
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1946 80 years ago Historical Events May 21 4 sources

Physicist Louis Slotin is fatally irradiated in a criticality incident during an experiment with the demon core at Los Alamos National Laboratory.

On May 21, in the year 1946, Physicist Louis Slotin is fatally irradiated in a criticality incident during an experiment with the demon core at Los Alamos National Laboratory. This event is recorded as a Historical Events event in the history of May 21, one of 476 recorded events on this date across all of history.

Louis Alexander Slotin was a Canadian physicist and chemist who took part in the Manhattan Project. Born and raised in the North End of Winnipeg, Manitoba, Slotin earned both his Bachelor of Science and Master of Science degrees from the University of Manitoba, before obtaining his doctorate in physical chemistry at King's College London in 1936. Afterwards, he joined the University of Chicago as a research associate to help design a cyclotron.

Key Facts

  • This event took place on May 21, 1946 (AD era).
  • It is categorised as a Historical Events event in recorded history.
  • Referenced in 4 Wikipedia articles.
  • Wikipedia source last updated on 19 May 2026.

On This Date in History 476

Type Year Date Event
Notable Deaths 2025 May 21 Gerry Connolly, American politician, U
Historical Events 2024 May 21 The Greenfield tornado kills 5 and injures 35 across rural Iowa, United States
Historical Events 2024 May 21 A stabbing spree on the Green line of the Taichung MRT injures four people, including the perpetrator
Notable Deaths 2024 May 21 Jan A
Selected Events 2024 May 21 The Greenfield tornado, estimated to have produced winds in excess of 309 miles per hour (497 km/h), moved across Iowa
Notable Deaths 2020 May 21 Alan Merten, fifth President of George Mason University (born 1941)
Notable Deaths 2019 May 21 Rik Kuypers, Belgian film director (born 1925)
Notable Deaths 2019 May 21 Binyavanga Wainaina, Kenyan writer (born 1971)
Historical Events 2017 May 21 Ringling Bros
Notable Deaths 2016 May 21 Nick Menza, American drummer and songwriter (born 1964)
Notable Deaths 2015 May 21 Annarita Sidoti, Italian race walker (born 1969)
Notable Deaths 2015 May 21 Twinkle, English singer-songwriter (born 1948)
Notable Deaths 2015 May 21 Jassem Al-Kharafi, Kuwaiti businessman and politician, 8th Kuwaiti Speaker of the National Assembly (born 1940)
Notable Deaths 2015 May 21 Fred Gladding, American baseball player and coach (born 1936)
Notable Deaths 2015 May 21 Louis Johnson, American bass player and producer (born 1955)
Selected Events 2015 May 21 Islamic State militants entered the ancient city of Palmyra
Historical Events 2014 May 21 Random killings occurred on the Bannan Line of the Taipei MRT, killing four and injuring 24
Notable Deaths 2014 May 21 Tunku Annuar, Malaysian son of Badlishah of Kedah (born 1939)
Notable Deaths 2014 May 21 Johnny Gray, American baseball player (born 1926)
Notable Deaths 2014 May 21 Jaime Lusinchi, Venezuelan physician and politician, President of Venezuela (born 1924)
Notable Deaths 2014 May 21 Alireza Soleimani, Iranian wrestler (born 1956)
Selected Events 2014 May 21 A Taiwanese man carried out a stabbing spree on a Taipei Metro train, killing four people and injuring 24 others
Notable Deaths 2013 May 21 Count Christian of Rosenborg, member of the Danish royal family (born 1942)
Notable Deaths 2013 May 21 Frank Comstock, American trombonist, composer, and conductor (born 1922)
Notable Deaths 2013 May 21 Cot Deal, American baseball player and coach (born 1923)
Notable Deaths 2013 May 21 Leonard Marsh, American businessman, co-founded Snapple (born 1933)
Notable Deaths 2013 May 21 Bob Thompson, American pianist and composer (born 1924)
Notable Deaths 2013 May 21 Dominique Venner, French journalist and historian (born 1935)
Historical Events 2012 May 21 A bus accident near Himara, Albania kills 13 people and injures 21 others
Historical Events 2012 May 21 A suicide bombing kills more than 120 people in Sanaa, Yemen
Notable Deaths 2012 May 21 Eddie Blazonczyk, American singer-songwriter (born 1941)
Notable Deaths 2012 May 21 Otis Clark, American butler and preacher, survivor of the Tulsa race riot (born 1903)
Notable Deaths 2012 May 21 Constantine of Irinoupolis, Metropolitan of Irinoupolis and Primate of the Ukrainian Orthodox Church of the USA (born 19
Notable Deaths 2012 May 21 Roman Dumbadze, Georgian commander (born 1964)
Notable Deaths 2012 May 21 Douglas Rodríguez, Cuban boxer (born 1950)
Notable Deaths 2012 May 21 Bill Stewart, American football player and coach (born 1952)
Notable Deaths 2012 May 21 Alan Thorne, Australian anthropologist and academic (born 1939)
Historical Events 2011 May 21 Radio broadcaster Harold Camping predicted that the world would end on this date
Historical Events 2010 May 21 JAXA, the Japan Aerospace Exploration Agency, launches the solar-sail spacecraft IKAROS aboard an H-IIA rocket
Historical Events 2006 May 21 The Republic of Montenegro holds a referendum proposing independence from the State Union of Serbia and Montenegro; 55%
Notable Deaths 2006 May 21 Spencer Clark, American race car driver (born 1987)
Notable Deaths 2006 May 21 Katherine Dunham, American dancer, choreographer, and author (born 1909)
Notable Deaths 2006 May 21 Cherd Songsri, Thai director, producer, and screenwriter (born 1931)
Notable Deaths 2006 May 21 Billy Walker, American singer-songwriter and guitarist (born 1929)
Historical Events 2005 May 21 The tallest roller coaster in the world, Kingda Ka opens at Six Flags Great Adventure in Jackson Township, New Jersey
Notable Deaths 2005 May 21 Deborah Berger, American outsider artist (born 1956)
Notable Deaths 2005 May 21 Stephen Elliott, American actor (born 1918)
Notable Deaths 2005 May 21 Howard Morris, American actor and director (born 1919)
Selected Events 2005 May 21 The world's tallest roller coaster, Kingda Ka, opened at Six Flags Great Adventure in Jackson, New Jersey, U
Historical Events 2003 May 21 The 6

This article draws on content from Wikipedia, available under CC BY-SA 4.0.

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