1848 178 years ago Historical Events September 20

The American Association for the Advancement of Science is created.

On September 20, in the year 1848, The American Association for the Advancement of Science is created. This event is recorded as a Historical Events event in the history of September 20, one of 437 recorded events on this date across all of history.

The American Association for the Advancement of Science (AAAS) is a United States–based international nonprofit with the stated mission of promoting cooperation among scientists, defending scientific freedom, encouraging scientific responsibility, and supporting scientific education and science outreach for the betterment of all humanity. AAAS was the first permanent organization established to promote science and engineering nationally and to represent the interests of American researchers from across all scientific fields. It is the world's largest general scientific society, with over 120,000 members, and is the publisher of the well-known scientific journal Science.

Key Facts

  • This event took place on September 20, 1848 (AD era).
  • It is categorised as a Historical Events event in recorded history.
  • Referenced in 1 Wikipedia article.
  • Wikipedia source last updated on 26 August 2026.

On This Date in History 437

Type Year Date Event
Notable Deaths 2025 Sep 20 Matt Beard, English football manager (born 1978)
Notable Deaths 2024 Sep 20 Ibrahim Aqil, Hezbollah militant (born 1962)
Notable Deaths 2024 Sep 20 Kathryn Crosby, American actress and singer (born 1933)
Notable Deaths 2024 Sep 20 Daniel J. Evans, American politician, 16th Governor of Washington (born 1925)
Notable Deaths 2024 Sep 20 Sayuri, Japanese musician (born 1996)
Notable Deaths 2024 Sep 20 Cleo Sylvestre, English actress (born 1945)
Notable Deaths 2024 Sep 20 Eduardo Xol, American designer and author (born 1966)
Notable Deaths 2023 Sep 20 Maddy Cusack, English football player (born 1995)
Historical Events 2019 Sep 20 Roughly four million people, mostly students, demonstrate across the world to address climate change. Sixteen-year-old…
Historical Events 2018 Sep 20 At least 161 people die after a ferry capsizes close to the pier on Ukara Island in Lake Victoria, Tanzania.
Historical Events 2017 Sep 20 Hurricane Maria makes landfall in Puerto Rico as a powerful Category 4 hurricane, resulting in 2,975 deaths,…
Notable Deaths 2016 Sep 20 Curtis Hanson, American film director and screenwriter (born 1945)
Notable Deaths 2016 Sep 20 Peter Leo Gerety, American bishop (born 1912)
Notable Deaths 2015 Sep 20 Mario Caiano, Italian director, producer, and screenwriter (born 1933)
Notable Deaths 2015 Sep 20 Jagmohan Dalmiya, Indian businessman (born 1940)
Notable Deaths 2015 Sep 20 Jack Larson, American actor (born 1928)
Notable Deaths 2014 Sep 20 Anatoly Berezovoy, Russian colonel, pilot, and cosmonaut (born 1942)
Notable Deaths 2014 Sep 20 Polly Bergen, American actress and singer (born 1930)
Notable Deaths 2014 Sep 20 Takako Doi, Japanese scholar and politician (born 1928)
Notable Deaths 2014 Sep 20 George Sluizer, French-Dutch director, producer, and screenwriter (born 1932)
Notable Deaths 2013 Sep 20 James B. Vaught, American general (born 1926)
Notable Deaths 2013 Sep 20 Gilles Verlant, Belgian journalist and critic (born 1957)
Notable Deaths 2012 Sep 20 Fortunato Baldelli, Italian cardinal (born 1935)
Notable Deaths 2012 Sep 20 Richard H. Cracroft, American author and academic (born 1936)
Notable Deaths 2012 Sep 20 Tereska Torrès, French soldier and author (born 1920)
Historical Events 2011 Sep 20 The United States military ends its "don't ask, don't tell" policy, allowing gay men and women to serve openly for the…
Notable Deaths 2011 Sep 20 Oscar Handlin, American historian and author (born 1915)
Notable Deaths 2011 Sep 20 Burhanuddin Rabbani, Afghan academic and politician, 10th President of Afghanistan (born 1940)
Selected Events 2011 Sep 20 The United States military ended its "don't ask, don't tell" policy, consequently allowing gay and lesbian people to…
Notable Deaths 2010 Sep 20 Leonard Skinner, American soldier and educator (born 1933)
Historical Events 2008 Sep 20 A dump truck full of explosives detonates in front of the Marriott hotel in Islamabad, Pakistan, killing 54 people and…
Selected Events 2008 Sep 20 An explosive-laden truck detonated in front of the Marriott hotel in Islamabad, Pakistan, killing 54 people and…
Historical Events 2007 Sep 20 Between 15,000 and 20,000 protesters march on Jena, Louisiana, United States, in support of six black youths who had…
Notable Deaths 2007 Sep 20 Johnny Gavin, Irish footballer (born 1928)
Notable Deaths 2006 Sep 20 Armin Jordan, Swiss conductor (born 1932)
Notable Deaths 2006 Sep 20 Sven Nykvist, Swedish director, producer, and cinematographer (born 1922)
Notable Deaths 2006 Sep 20 John W. Peterson, American pilot and songwriter (born 1921)
Notable Deaths 2005 Sep 20 Simon Wiesenthal, Austrian human rights activist, Holocaust survivor (born 1908)
Notable Deaths 2004 Sep 20 Brian Clough, English footballer and manager (born 1935)
Notable Deaths 2004 Sep 20 Townsend Hoopes, American soldier and historian (born 1922)
Historical Events 2003 Sep 20 Civil unrest in the Maldives breaks out after a prisoner is killed by guards.
Notable Births 2003 Sep 20 Thomas Matthew Crooks, American attempted assassin of Donald Trump (died 2024)
Notable Deaths 2003 Sep 20 Simon Muzenda, Zimbabwean politician, 1st Vice-President of Zimbabwe (born 1922)
Notable Deaths 2003 Sep 20 Gareth Williams, Baron Williams of Mostyn, Welsh lawyer and politician, Lord President of the Council (born 1941)
Notable Deaths 2002 Sep 20 Sergei Bodrov Jr., Russian actor, director, and screenwriter (born 1971)
Historical Events 2001 Sep 20 In an address to a joint session of Congress and the American people, U.S. President George W. Bush declares a "war on…
Historical Events 2000 Sep 20 The United Kingdom's MI6 Secret Intelligence Service building is attacked by individuals using a Russian-built RPG-22…
Notable Deaths 2000 Sep 20 Gherman Titov, Russian general, pilot, and astronaut (born 1935)
Selected Events 2000 Sep 20 The Real Irish Republican Army carried out a rocket-launcher attack on the MI6 headquarters in London, with no…
Notable Deaths 1999 Sep 20 Robert Lebel, Canadian businessman (born 1905)

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

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