John Leonard Riddell

Polish classical pianist, mathematician | Academy of Music in Gdańsk, Feliks Nowowiejski General Secondary Music School in Gdańsk, University of Gdańsk

Sigmund Freud Private University | February 20, 1981 - Tübingen: May 9, 1587 | Katharina Reboly | February 20, 1981 - Tübingen: May 9, 1587

Estonian art historian and philosopher | Estonian Academy of Arts | February 20, 1979 - Estonia Governorate: December 8, 1881 | Regina-Nino Mion | February 20

Mexican Biodesigner, transdisciplinary artist & Innovative Entrepreneur | Mexico City: February 20, 1979 - January 1, 1677 | Mariana Peñalva (Mariana Penalva)

Russian scientist | honorary doctor of the Tokai University | MSU Faculty of Mechanics and Mathematics | Khimki: February 20, 1978 - Marentino: May 31, 1914

Australian physicist and sociologist | Carnegie Fellow (2020), Fellow of the American Association for the Advancement of Science (2021) | University of New

Spanish politician | University of Deusto | Bilbao: February 20, 1967 - Brooklyn Naval Hospital: October 29, 1931 | Begoña Gil Llanos (Begona Gil Llanos)

Peter the Great Saint Petersburg State Polytechnical University | February 20, 1967 - Zhukovsky: May 30, 1985 | Shi Nguyen-Kuok | February 20, 1967

German chemist | Blue Obelisk Award (2006) | University of Bonn | Neuwied: February 20, 1966 - Sary Shagan: June 9, 1960 | Christoph Steinbeck | Neuwied

American author, theologian, and philosopher | University of Virginia, Wilde Lake High School, University of Lancaster, University of Maryland, University of Cambridge

Belgian molecular biologist | Fellow of the American Physical Society, Fellow of the American Association for the Advancement of Science (2009), Fellow of the

Química ambiental, petróloga, geofísica, científica mexicana | Sor Juana Inés de la Cruz Recognition | University of Hamburg, Autonomous University of

Russian businessman (1959) | Russian Federation Presidential Certificate of Gratitude, Decoration "For Beneficence", Order of Friendship | Moscow Institute of

physicist researching nanomaterials | Benemérita Universidad Autónoma de Puebla, Autonomous University of San Luis Potosí | February 20, 1958 - Poznań

American professor of Polymer Science and Engineering | Massachusetts Institute of Technology, University of Massachusetts Amherst | Pittsfield: February 20

American physicist | Fellow of the American Association for the Advancement of Science, honorary doctor of the Shanghai Jiao Tong University (2015), Fellow of

American computer scientist (*1953) | University of North Carolina at Chapel Hill, Stanford University | Long Beach: February 20, 1953 - Hightstown: June 9, 1983

Swedish inventor | Polhem Prize (2013), Europaean Woman Innovator of the Year (2017) | Stockholm: February 20, 1952 - 14th arrondissement of Paris: December 30, 1993

American organic chemist | Ernest Guenther Award (2004), Arthur C. Cope Award (1994) | University of California, Los Angeles, Harvard University | Chula Vista

ESPCI Paris, PSL University, Pierre and Marie Curie University | February 20, 1950 - Ferrara: January 1, 1468 | Claude Hennion | February 20, 1950

Czech physical chemist and politician | honorary doctorate of Slovak University of Technology in Bratislava (2006), Honorable Mention from Mensa Czech Republic

Excellence in Education of Ukraine Badge, Honored Worker of Education of Ukraine, Order of Princess Olga, 3rd class | Faculty of Physics of the Taras

American philosopher | Fellow of the American Academy of Arts and Sciences (2023) | Brandeis University | February 20, 1948 - Baltimore: April 16, 1901

British philosopher (born 1947) | Guggenheim Fellowship (1988), Hempel Award (2020), Berlin Prize (2015), Lakatos Award (1987) | Christ's College, Princeton

American astrophysicist and cosmologist | Albert Einstein Medal (2003), Ernest Orlando Lawrence Award (1994), Fellow of the American Physical Society, Nobel

Israeli physicist | Ivan Antonovych Yefremov Literary Prize (2009), Aelita Prize (2012) | Baku State University | Baku: February 20, 1944 - Moscow: February 11, 2023

Serbian physicist (1943-2019) | University of Novi Sad, University of Belgrade | Novi Sad: February 20, 1943 - February 9, 2019 | Đorđe Đukić (Dorde Dukic)

American biochemist | Margaret Oakley Dayhoff Award (1984), Guggenheim Fellowship | February 20, 1942 - New Orleans: September 30, 1843 | Dagmar Ringe

Polish mathematician (1939-2005) | University of Wrocław | Warsaw: February 20, 1939 - Tunisia: September 25, 2005 | Kazimierz Głazek (Kazimierz Glazek)

Russian scientist | Merited Scientist of the Russian Federation | Saratov State University | Saratov: February 20, 1939 - Tomsk: July 7, 2018 | Anatoly Grishin

american-Israeli Jewish physicist | Massachusetts Institute of Technology | New York City: February 20, 1938 - Melbourne: August 22, 2024 | Gerald Schroeder

Polish philosopher | Jagiellonian University | Kraków: February 20, 1937 - Kraków: December 6, 1943 | Karol Tarnowski | Kraków: February 20, 1937 - Kraków

German Nobel laureate in chemistry | Emil-von-Behring-Prize (1982), Otto Warburg Medal (1977), X-ray badge (2004), Bavarian Maximilian Order for Science and

German-American earth scientist and inventor | February 20, 1933 - Oxford: November 1, 1908 | Ralph Bernstein | February 20, 1933 - Oxford: November 1, 1908

American writer | Moscow: February 20, 1933 - Elie and Earlsferry: April 22, 2001 | Vladimir Albrecht | Moscow: February 20, 1933 - Elie and Earlsferry: April 22, 2001

American mathematician | Abel Prize (2011), Steele Prize for Mathematical Exposition (2004), Leroy P. Steele Prize (1982), Steele Prize for Lifetime

Jubilee Medal "60 Years of Victory in the Great Patriotic War 1941–1945", Order of the Red Banner of Labour, VDNKh gold medal, Jubilee Medal "50 Years of

German philosopher, information scientist and librarian (1927-2017) | Cologne: February 20, 1927 - Bad König: October 24, 2017 | Ingetraut Dahlberg | Cologne

Romanian diplomat and mathematician | University of Bucharest | Oradea: February 20, 1927 - Bucharest: May 21, 2018 | Mircea Malița (Mircea Malita) | Oradea

Russian mathematician (1925-1988) | Order of the Red Banner of Labour | Moscow State University, Ion Creangă Pedagogical State University | Bălți: February

Dutch chemist | University of Groningen | February 20, 1925 - February 11, 2025 | Jan Drenth | February 20, 1925 - February 11, 2025 | University of Groningen

American chemist, discovered two of the world’s most significant anti-cancer agents | North Carolina Award for Science (2005), Charles F. Kettering Prize (2000)

American chemist and educator (1923–2021) | National Medal of Technology and Innovation (2010), National Inventors Hall of Fame (2000), National Women's Hall

Russian-Israeli mathematician | EATCS award (2011) | gap theorem, Trakhtenbrot's theorem, Büchi–Elgot–Trakhtenbrot theorem | Institute of Mathematics of

Belgian academic and resistance fighter (1921-2021) | Commander of the Order of the Crown, Grand Officer of the Order of Leopold II, Grand Officer of the Order

American test pilot (1921–1966) | Golden Plate Award (1964), International Space Hall of Fame (1995), FAI Gold Air Medal, Air Medal, Harmon Trophy, NASA

German mathematician (1920-2008) | University of Bonn | Solingen: February 20, 1920 - Aachen: February 6, 2008 | Claus Müller (Claus Muller) | Solingen

Croatian chemist (1920-2008) | Order of Danica Hrvatska (1997) | Faculty of Science, University of Zagreb | Dolac: February 20, 1920 - Koprivnica: July 30, 2008

Argentine physicist | Honorary Doctorate of University of Buenos Aires | Monte de los gauchos: February 20, 1919 - Mexico City: November 15, 2012 | Rolando

Swiss chemist (1919-1995) | Kantonsschule Solothurn, ETH Zurich | Lüterkofen: February 20, 1919 - June 24, 1995 | Werner Ingold | Lüterkofen: February 20

American engineer, author and politician (1918-1993) | University of Manitoba, Rosthern Junior College, University of Saskatchewan | Rozivka: February 20, 1918

Japanese biologist | Osaka University | Osaka: February 20, 1917 - Osaka: March 27, 2011 | Yasushi Nishiwaki | Osaka: February 20, 1917 - Osaka: March 27, 2011

Austrian esotericist and founder of the Welt-Spirale worldview community | Wallern an der Trattnach: February 20, 1915 - Linz: February 26, 1968 | Leopold

American inventor (1912–2011) | National Inventors Hall of Fame (2011) | Louisville: February 20, 1912 - Wilton: August 11, 2011 | George Devol | Louisville

Romanian sociologist, historian and psychologist (1907-1980) | Humboldt University of Berlin, University of Bucharest | Recea: February 20, 1907 - Bucharest

French historian (1906–1982) | prix Olivier de Serres (1959), Grand prix littéraire de Provence (1981), Saintour Prize (1979), Montyon Prize (1976), Prix

American microbiologist (1901-1982) | honorary doctor of the University of Lille (1960), Pulitzer Prize for General Nonfiction (1969), Robert Koch Prize

Estonian-American architect (1901–1974) | Rokach Award (1984), Fellow of the American Institute of Architects, Rome Prize, Royal Gold Medal (1972), Golden

Russian inventor (1898–1978) | Merited Inventor of the RSFSR (1974) | Krasnodar: February 20, 1898 - Krasnodar: April 4, 1978 | Semyon Davidovich Kirlian

Soviet scientist (1894—1984) | Honored Scientist of the RSFSR | Moscow: February 20, 1894 - Moscow: February 8, 1984 | Aleksandr Kabanov | Moscow: February

Dutch university teacher (1886-1967) | University of Amsterdam | Middelburg: February 20, 1886 - Apeldoorn: October 19, 1967 | Johan Pieter Wibaut

American engineer (1883-1960) | Vineland: February 20, 1883 - May 29, 1960 | Edward Washburn Kellogg | Vineland: February 20, 1883 - May 29, 1960

German philosopher (1882–1950) | Imperial University of Dorpat, University of Marburg | Riga: February 20, 1882 - Göttingen: October 9, 1950 | Nicolai

Italian physicist (1878-1934) | Sapienza University of Rome | Marino: February 20, 1878 - Rome: May 23, 1934 | Domenico Pacini | Marino: February 20, 1878

Catalan linguist (1868–1948) | honorary doctor of the University of Toulouse (1945) | Diccionari General de la Llengua Catalana, Normes ortogràfiques | La

American psychologist (1866–1947) | February 20, 1866 - November 18, 1947 | Edwin Diller Starbuck | February 20, 1866 - November 18, 1947

Swiss mathematician (1865 - 1922) | Frederick William University Berlin, University of Geneva | Geneva: February 20, 1865 - Geneva: January 30, 1922 | Charles

American Navy surgeon general (1863–1931) | honorary master's degree (1912), honorary doctorate from Columbia University (1911), Doctor of Law (honorary) (1911)

Czech mathematician (1860–1922) | Grand prix des sciences mathématiques (1900) | Lerch zeta function | Charles University, Humboldt University of Berlin

February 20, 1854 - Uppsala Cathedral Assembly: February 8, 1979 | Avksenty Filippovich Yurtov | February 20, 1854 - Uppsala Cathedral Assembly: February 8, 1979

Polish-Russian soldier and explorer of Middle Asia (1849-1910) | Order of St. Vladimir, Order of Saint Anna | Constantine Artillery School | Warsaw: February

American inventor | February 20, 1845 - November 23, 1914 | Hermann Hammesfahr | February 20, 1845 - November 23, 1914

American inventor | Augusta: February 20, 1844 - Edo: October 26, 1817 | Harriet A. Brown | Augusta: February 20, 1844 - Edo: October 26, 1817

Austrian physicist and philosopher (1844–1906) | Foreign Member of the Royal Society (1899), Honorary doctor of the University of Oxford, Bavarian Maximilian

Italian priest (1838-1925) | Popoli Terme: February 20, 1838 - Vatican City: July 31, 1925 | Alberto Lepidi | Popoli Terme: February 20, 1838 - Vatican City

German politician, chemist and entrepreneur (1837-1902) | Berlin: February 20, 1837 - Berlin: June 13, 1902 | Friedrich Goldschmidt | Berlin: February 20, 1837

French scientist (1837–1908) | Grand Officer of the Legion of Honour (1900), Honorary Fellow of the Royal Society of Edinburgh, Foreign Member of the Royal

Swiss physicist (1833-1910) | Basel: February 20, 1833 - Basel: December 23, 1910 | Eduard Hagenbach-Bischoff - Jakob Eduard Hagenbach-Bischoff | Basel

Russian philosopher (1831–1901) | Faculty of History and Philology of Moscow University | Moscow: February 20, 1831 - Saint Petersburg: March 12, 1901

French clockmaker (1830-1896) | Sainville: February 20, 1830 - Saint-Maur-des-Fossés: March 14, 1896 | Eugène Farcot - Henry Eugène Adrien Farcot (Eugene Farcot)

Medical faculty of Moscow University | February 20, 1829 - London: January 31, 1980 | Grigory Antonovich Zakharyin | February 20, 1829 - London: January 31, 1980

French chemist (1815-1873) | 72 names on the Eiffel Tower, Officer of the Legion of Honour, Officer of the Order of Leopold | École polytechnique, Mines ParisTech

French chemist (1813-1880) | Knight of the Legion of Honour, Jecker Prize (1869), La Caze Prize of the Academy of Sciences (1875) | Paris Medical Faculty

Spanish scientist and chemist (1810-1893) | Grand Cross of the Order of Isabella the Catholic | Madrid: February 20, 1810 - Oviedo: September 2, 1893 | León

German mathematician | Wesel: February 20, 1798 - Charlottenburg: February 14, 1870 | Adolf Ferdinand Wenceslaus Brix | Wesel: February 20, 1798

German philosopher and theologian | University of Tübingen | Tübingen: February 20, 1759 - Tübingen: November 24, 1821 | Johann Friedrich Flatt | Tübingen

Czech entrepreneur | Asparn an der Zaya: February 20, 1752 - Vienna: May 23, 1816 | Joseph Hardtmuth | Asparn an der Zaya: February 20, 1752 - Vienna: May 23, 1816

Korean scholar (1534-1599) | February 20, 1534 - August 8, 1599 | Song Ikp'il | February 20, 1534 - August 8, 1599