Mexican poet | Mexico City: July 21, 1972 - Berlin: August 7, 1782 | Daniel Téllez (Daniel Tellez) | Mexico City: July 21, 1972 - Berlin: August 7, 1782

Canadian astronomer | Kavli Prize in Astrophysics (2024), Officer of the Order of Canada (2020), Helen B. Warner Prize for Astronomy (2007), Nature's 10

Italian computer scientist (1971–2024) | Oberwolfach Prize (2000), ACM Fellow (2021) | Sapienza University of Rome, DIMACS, Massachusetts Institute of Technology

scientist | Boston University, University of Michigan, Ball High School | Taiwan: July 21, 1970 - October 5, 1862 | Emma Hwang | Taiwan: July 21, 1970

conservation biologist | Fellow of the Australian Academy of Science (2005), Fenner Medal (2000), Rhodes Scholarship (1984), Fellow of the Royal Society

MSU Faculty of Physics | July 21, 1961 - Berlin: April 30, 1921 | Aleksandr Tishin | July 21, 1961 - Berlin: April 30, 1921 | MSU Faculty of Physics

Russian historian | Merited Scientist of the Russian Federation | Ural State University, Moscow State University | Yekaterinburg: July 21, 1955 - Perm: August 8, 1975

French mathematician | Langevin prize (1987), CNRS bronze medal, doctor honoris causa of Keiō University | Paris Diderot University, École polytechnique

Belarusian professor & scientist | Order of Fatherland 3rd Class, Order of Francisc Skorina (2007) | Belarusian National Technical University | Gomel: July 21

Austrian philosopher | Kardinal-Innitzer-Preis | Weiten: July 21, 1945 - January 6, 2025 | Friedrich Wallner | Weiten: July 21, 1945 - January 6, 2025

German philosopher | Guben: July 21, 1944 - Venice: May 3, 1949 | Volker Gerhardt | Guben: July 21, 1944 - Venice: May 3, 1949

Russian mathematician | Voronezh State University | Nikolskoe: July 21, 1944 - August 25, 2020 | Anatoliy Baskakov | Nikolskoe: July 21, 1944 - August 25, 2020

Polish philosopher (1943-2009) | Gold Cross of Merit (2004), Medal of the National Education Commission (1991) | 6 Mickiewicza Street in Olsztyn, Warsaw

Israeli physicist | Lilienfeld Prize (2010), Order of the Star of Italy (2017), Fellow of the American Physical Society, Dwight Nicholson Medal for Outreach

Russian scientist | Order of Honour, Order of the Badge of Honour, Order "For Merit to the Fatherland", 4th class, State Prize of the Russian Federation

Vietnamese physicist and theoretical physicist | Hồ Chí Minh Prize, Order of Friendship, honorary doctor of the École normale supérieure de Cachan (2011)

mathematician (1937-2003) | University of Georgia, The Citadel, Tulane University | Canton: July 21, 1937 - May 29, 2003 | W. R. Alford | Canton: July 21, 1937

British physicist (1937-2021) | Frodsham: July 21, 1937 - April 27, 2021 | John Latham | Frodsham: July 21, 1937 - April 27, 2021

Belgian philosopher | Prijs Vrijzinnig Humanisme (1997) | Lembeek: July 21, 1933 - January 26, 2019 | Hubert Dethier | Lembeek: July 21, 1933 - January 26

Russian mathematician (1932–2010) | Order "For Merit to the Fatherland", 4th class, Order of the October Revolution, Order of the Red Banner of Labour, Lenin

Russian jurist | Order of Friendship, Order "For Merit to the Fatherland", 4th class, Merited Scientist of the Russian Federation, Russian Federation

Brazilian chemist | Simão Mathias Medal, Great Cross of the National Order of Scientific Merit | Federal University of Rio de Janeiro, Rio de Janeiro State University

American philosopher | Aquinas Medal (1994) | The Catholic University of America | Cook County: July 21, 1930 - Potomac: March 6, 2021 | Jude Patrick Dougherty

German gynaecologist and obstetrician (1925–2021) | Ernst Reuter Medal (1988), Officer's Cross of the Order of Merit of the Federal Republic of Germany

Canadian chemist | Remsen Award (1991), American Chemical Society Award in Theoretical Chemistry (1997), Lavoisier Medal (1994), Wolf Prize in Chemistry

Austrian academic | City University of New York, New York University Tandon School of Engineering | Vienna: July 21, 1923 - New Jersey: December 6, 2017

Spanish philosopher (1920–2004) | Colegio del Pilar | Madrid: July 21, 1920 - Madrid: January 13, 2004 | Rafael Gambra Ciudad | Madrid: July 21, 1920

Swiss pharmacologist and professor at ETH Zurich (1918-2010) | Zurich: July 21, 1918 - Schiers: April 11, 2010 | Peter G. Waser | Zurich: July 21, 1918

Canadian educator, philosopher, and scholar | Governor General's Award for English-language non-fiction (1962), Companion of the Order of Canada, Molson Prize (1968)

American physicist, group leader during the Manhattan Project (1907–1990) | Fellow of the American Physical Society, Guggenheim Fellowship (1954)

Norwegian chemist | Christiania: July 21, 1891 - October 8, 1919 | Erling Finne | Christiania: July 21, 1891 - October 8, 1919

French physicist and resistant (1890-1941) | Prize Louis Ancel (1922) | ESPCI Paris, PSL University | 14th arrondissement of Paris: July 21, 1890 - Paris

American chemist (1888-1957) | Lorena: July 21, 1888 - San Francisco: September 15, 1957 | Charles W. Crawford | Lorena: July 21, 1888 - San Francisco

Italian chemist and teacher | honorary doctor of the University of Madrid Complutense (1934) | Fontana Liri: July 21, 1883 - Fiuggi: August 10, 1938 | Nicola

American chemist (1878-1942) | American Institute of Chemists Gold Medal (1941) | University of Illinois system, University of Washington | Bennington: July

Japanese philosopher | University of Tokyo | Matsumoto: July 21, 1877 - Tokyo: January 17, 1950 | Seiichi Hatano | Matsumoto: July 21, 1877 - Tokyo: January 17, 1950

German chemist (1867–1936) | Weilburg: July 21, 1867 - November 18, 1936 | Richard Herz | Weilburg: July 21, 1867 - November 18, 1936

American mathematician | Colgate University, University of Chicago | Watkins Glen: July 21, 1861 - Chicago: May 21, 1937 | Herbert Slaught | Watkins Glen: July

Latvian philosopher | Imperial University of Dorpat | Courland Governorate: July 21, 1860 - Voronezh: March 24, 1919 | Jēkabs Osis (Jekabs Osis) | Courland

American physicist and mathematician (1849–1924) | University of Michigan | Rochester: July 21, 1849 - Washington, D.C.: June 29, 1924 | Robert Simpson

Danish chemist | July 21, 1837 - January 1, 1918 | Vilhelm Storch | July 21, 1837 - January 1, 1918

German naturalist (1834-1920) | Röbel: July 21, 1834 - Neubrandenburg: August 30, 1920 | Franz Engel | Röbel: July 21, 1834 - Neubrandenburg: August 30, 1920

American inventor (1826-1886) | Oppenheim: July 21, 1826 - Terra Alta: October 13, 1886 | Mahlon Loomis | Oppenheim: July 21, 1826 - Terra Alta: October 13, 1886

Swedish philosopher (1823–1909) | Uppsala University | July 21, 1823 - Lund: January 7, 1909 | Johan Jakob Borelius | July 21, 1823 - Lund: January 7, 1909

July 21, 1819 - January 1, 1598 | Josef Wolfgang Von Deschwanden | July 21, 1819 - January 1, 1598

American mathematician (1818-1893) | New-York Central College, McGrawville, African Free School | New York City: July 21, 1818 - New York City: August 16, 1893

French physicist | Foreign Member of the Royal Society (1852), 72 names on the Eiffel Tower, Copley Medal (1869), Rumford Medal (1848), Matteucci Medal (1875)

Romanian academic (1808-1864) | University of Pavia | Bocșa: July 21, 1808 - Sânmihaiu Almașului: May 28, 1864 | Simion Bărnuţiu (Simion Barnutiu)

French chemist (1792-1878) | Officer of the Legion of Honour | Paris: July 21, 1792 - July 4, 1878 | Henri-François Gaultier de Claubry (Henri-Francois

British physician and chemist | Fellow of the Royal Society, Fellow of the Royal College of Physicians of Edinburgh, Fellow of the Royal Society of Edinburgh

French politician (1763-1839) | Pézenas: July 21, 1763 - Pézenas: February 17, 1839 | Henri Reboul | Pézenas: July 21, 1763 - Pézenas: February 17, 1839

Spanish priest and historian | University of Alcalá, University of Salamanca | Valladolid: July 21, 1702 - Madrid: May 5, 1773 | Enrique Flórez de Setién

French astronomer | collège Henri-IV de La Flèche | La Flèche: July 21, 1620 - Paris: July 12, 1682 | Jean Picard - Jean-Felix Picard | La Flèche: July 21