Ruan Yuan

British mathematician and TV presenter | David Attenborough Award (2024), Christopher Zeeman Medal (2018) | University College London, Presdales School

Belgian choreographer | Brussels metropolitan area: February 21, 1978 - 2nd arrondissement of Lyon: June 8, 1880 | Antoine Boute | Brussels metropolitan area

American professor of mathematics | University of California, Berkeley, Northern Arizona University | Santa Barbara: February 21, 1974 - Bratislava: December 1, 1959

Azerbaijani scientist | Honored Scientist of Azerbaijan (2020) | Lyceum of Physics, Mathematics and Computer Science, Igor Sikorsky Kyiv Polytechnic Institute

cryptographer | Knight of the National Order of Merit (2013) | Télécom Paris | Beersheba: February 21, 1967 - Ann Arbor: March 4, 2016 | David Naccache

Ukrainian university teacher | Moscow University's Department of Philosophy | Kryvyi Rih: February 21, 1963 - Łódź: December 2, 1912 | Jaroslaw Schramko

Russian mathematician | Kungur: February 21, 1961 - Moscow: June 27, 2018 | Valery Ashihmin | Kungur: February 21, 1961 - Moscow: June 27, 2018

Russian scientist | Order of Holy Prince Daniel of Moscow 3rd class, Order of St. Sergius of Radonezh 3rd class | Philological Faculty of Moscow State

Czech philosopher | Luhačovice: February 21, 1960 - Vinohrady: December 12, 1911 | Václav Umlauf (Vaclav Umlauf) | Luhačovice: February 21, 1960

scientist | Moscow Institute for History and Archives | Astrakhan: February 21, 1955 - January 1, 1960 | Sergey Karpenko | Astrakhan: February 21, 1955 - January 1, 1960

American scientist | IEEE Fellow | Lexington High School, Washington University in St. Louis, University of Michigan | February 21, 1955 - Kyiv: February 2, 1971

Polish philosopher | Olsztyn: February 21, 1955 - Glashütten: October 22, 1984 | Janusz Dobieszewski | Olsztyn: February 21, 1955 - Glashütten: October 22, 1984

American mathematician | Élie Cartan Prize (1993), The Shaw Prize in Mathematical Sciences (2009), Maryam Mirzakhani Prize in Mathematics (2008), Oswald

Czech philosopher, translator and university educator | participant in the resistance and resistance against communism | Charles University | Prague: February

Italian physicist | Naples: February 21, 1951 - January 1, 1361 | Chiara Nappi | Naples: February 21, 1951 - January 1, 1361

Graz University of Technology | February 21, 1950 - April 13, 1944 | Wolfhard Wegscheider | February 21, 1950 - April 13, 1944 | Graz University of Technology

Philosopher and cultural historian | Harvard University, University of Detroit Jesuit High School and Academy | Geneva: February 21, 1950 - Pontevedra: December 29, 1976

Estonian physicist, political scientist and politician | Order of the National Coat of Arms, 3rd Class (2006), Order of the National Coat of Arms, 5th Class (2002)

1948–) Hungarian mathematician | Paul Erdős Prize, Ostrowski Prize (1993), Széchenyi Prize (1998) | Eötvös Loránd University, Fazekas Mihály Gimnázium

Estonian physicist and philosopher | Order of the White Star, Medal Class | University of Tartu, Hugo Treffner Gymnasium | Tartu: February 21, 1947 - Estonia

Belgian philosopher | Jumet: February 21, 1947 - Poznań: November 22, 2014 | Marcel Paquet | Jumet: February 21, 1947 - Poznań: November 22, 2014

Belgian comics artist, playwright and mathematician | Limburg: February 21, 1945 - Couvin: August 17, 2021 | Maurice Vandeweyer | Limburg: February 21, 1945

Japanese mathematician | doctor honoris causa of the University of Turku | February 21, 1944 - Sydney: October 18, 2014 | Yōichi Motohashi (Yoichi Motohashi)

French physician and feminist | prix de la laïcité (2022), Commander of the National Order of Merit (2014), Officer of the Legion of Honour

Spanish philosopher | Menéndez Pelayo International Prize (2008), Civil Order of Alfonso X, the Wise, Grand Cross of the Civil Order of Alfonso X the Wise

Portuguese theologian | Penafiel: February 21, 1941 - Florence: August 18, 1960 | Afonso Rocha | Penafiel: February 21, 1941 - Florence: August 18, 1960

Israeli philosopher | February 21, 1940 - Genolier: February 11, 1994 | Tsion Avital | February 21, 1940 - Genolier: February 11, 1994

German philosopher (1937–2009) | Lauterbach: February 21, 1937 - Frankfurt: July 21, 2009 | Werner Becker | Lauterbach: February 21, 1937 - Frankfurt: July 21, 2009

Italian engineer and physicist | Charles Hard Townes Award (2006) | Maglie: February 21, 1936 - January 1, 2016 | Orazio Svelto | Maglie: February 21, 1936

Russian philosopher (1934–2021) | Order of Merit of the Federal Republic of Germany (2005), Plekhanov Prize (2000), Humboldt Prize (1994) | Moscow State University

Belgian philosopher (1929-2002) | February 21, 1929 - September 14, 2002 | Guido Maertens | February 21, 1929 - September 14, 2002

American virologist, epidemiologist and public health expert, known for his work on arthropod-borne viruses and emerging infectious diseases | Cornell University

parapsychologist (1928-2011) | Gdańsk: February 21, 1928 - August 18, 2011 | Helmut Schmidt | Gdańsk: February 21, 1928 - August 18, 2011

scholar, Indian physicist (1927-2007) | Padma Bhushan in science & engineering, Shanti Swarup Bhatnagar Prize for Science and Technology (1968), Fellow of the

Hungarian chemical engineer (1923-2013) | Battonya: February 21, 1923 - Zirc: November 6, 2013 | József Báthory (Jozsef Bathory) | Battonya: February 21

French historian and philosopher (1922–2010) | honorary doctor of the University of Neuchâtel (1985), CNRS silver medal (1979), CNRS silver medal (1978)

American political philosopher (1921–2002) | National Humanities Medal (1999), Spitz Prize, Rolf Schock Prize in Logic and Philosophy (1999), Fulbright

Soviet machine tool designer (1915-1970) | Stalin Prize, USSR State Prize | Saint Petersburg: February 21, 1915 - Saint Petersburg: April 11, 1970 | Alexey

French resistance fighter (1913-1943) | deported French resistance, mort pour la France, Croix de guerre 1939–1945, Resistance Medal (1952), Knight of the

American chemist | Fellow of the American Physical Society, Guggenheim Fellowship (1962), Glenn T. Seaborg Award for Nuclear Chemistry (1960) | California

Hungarian mathematician who worked in group theory, graph theory, and geometry (1912–1972) | Kossuth Prize (1951), Kossuth Prize (1961) | Budapest University

American chemist | Karlsruhe: February 21, 1911 - Pittsburgh: December 25, 1995 | Klaus H. Hofmann | Karlsruhe: February 21, 1911 - Pittsburgh: December 25, 1995

Czech yogi | Litvínov: February 21, 1908 - Prague: July 4, 1974 | Kvetoslav Minarik | Litvínov: February 21, 1908 - Prague: July 4, 1974

French novelist and poet (1903–1976) | Straelen Translator’s Prize provided by Kunststiftung NRW (2017), Prix des Deux Magots (1933) | University of Paris

Danish biochemist and physiologist (1895-1976) | Nobel Prize in Physiology or Medicine (1943) | Technical University of Denmark, University of Graz

Indian chemist (1894–1955) | Fellow of the Institute of Physics, Knight Bachelor, Officer of the Order of the British Empire, Fellow of the Royal Institute

German mathematician (1888–1937) | Ackermann–Teubner Memorial Award (1934) | University of Stuttgart, University of Strasbourg, Einhard-Gymnasium (Aachen)

Hungarian communist newspaper editor and politician (1885-1950) | Kossuth Prize (1949) | Eötvös Loránd University | Sárvár: February 21, 1885 - Budapest

mechanic, philosopher and political activist | Morshansk: February 21, 1883 - Davos: May 1, 1910 | Nikifor Efremovich Vilonov | Morshansk: February 21, 1883

American mathematician (1881–1966) | Columbia University | Cleveland: February 21, 1881 - Lake Wales: October 15, 1966 | Eugenie M. Morenus | Cleveland

French theologian (1877-1964) | Faculty of Arts of Paris | Auch: February 21, 1877 - Rome: February 15, 1964 | Reginald Garrigou-Lagrange | Auch: February 21

German university teacher (1877-1958) | University of Göttingen | February 21, 1877 - Dresden: December 3, 1958 | Paul Eugen Böhmer (Paul Eugen Bohmer)

English mathematician (1876-1965) | Trinity College Dublin (1907), University of Cambridge (1926), Girton College | Streatham Common: February 21, 1876

Swedish chemist (1874-1940) | Lund University | Helsingborgs Maria church parish: February 21, 1874 - Uppsala Cathedral Assembly: December 25, 1940 | Ludwig

Statsrådet Mauritz Hallberg's prize (1923), Commander of the Order of the White Rose of Finland, Knight Officer of the Order of the Polar Star (1909)

Japanese chemist (1865-1930) | Order of the Sacred Treasure, 2nd Class | University of Tokyo | Edo: February 21, 1865 - Sendai: July 11, 1930 | Ogawa Masataka

February 21, 1864 - Uttar Pradesh: January 20, 2020 | Albin Belar | February 21, 1864 - Uttar Pradesh: January 20, 2020

Japanese ethicist | Kyoto Prefecture: February 21, 1858 - December 21, 1918 | Nakashima Rikizō (Nakashima Rikizo) | Kyoto Prefecture: February 21, 1858

Czech chemist (1857-1918) | Nové Strašecí: February 21, 1857 - Vinohrady: November 4, 1918 | Karel Lukáš (Karel Lukas) | Nové Strašecí: February 21

German chemist (1852–1923) | Bonn: February 21, 1852 - Heidelberg: June 3, 1923 | Friedrich Krafft | Bonn: February 21, 1852 - Heidelberg: June 3, 1923

mathematician (1845-1912) | Zagorje ob Savi: February 21, 1845 - Ljubljana: October 16, 1912 | Josip Celestina | Zagorje ob Savi: February 21, 1845

Austrian inventor, social reformer and author (1838–1921) | Kolín: February 21, 1838 - Vienna: December 21, 1921 | Lynkeus | Kolín: February 21, 1838

British surgeon (1836-1894) | University of St Andrews | Stretford: February 21, 1836 - Brisbane: June 16, 1894 | Joseph Bancroft | Stretford: February 21

1835-1905 | Imperial Academy of Medical Surgery | Saint Petersburg: February 21, 1835 - Novotorzhsky Uyezd: April 30, 1905 | Fëdor Nikolaevič Zavarykin

Austro-Hungarian scientist (1826-1878) | Bratislava: February 21, 1826 - Vienna: May 1, 1878 | Friedrich J. Haberlandt | Bratislava: February 21, 1826

French philosopher (1823–1903) | Béguey: February 21, 1823 - Paris: January 4, 1903 | Pierre Laffitte | Béguey: February 21, 1823 - Paris: January 4, 1903

American chemist (1822–1908) | Fellow of the American Academy of Arts and Sciences | Columbia University, Columbia University Vagelos College of Physicians

Scottish chemist, Regius Professor of Technology at the University of Edinburgh (1818-1859) | Fellow of the Royal Society of Edinburgh | University of

American businessman (1817–1894) | Rapallo: February 21, 1817 - Rapallo: January 17, 1894 | Domingo Ghirardelli | Rapallo: February 21, 1817 - Rapallo

English cleric and cardinal (1801–1890) | Great Ealing School, Trinity College | London: February 21, 1801 - Edgbaston: August 11, 1890 | John Henry Newman

French inventor (1795–1859) | Collas process | Paris: February 21, 1794 - Paris: March 3, 1859 | Achille Collas | Paris: February 21, 1794 - Paris: March 3, 1859

Baltic German pharmacist, botanist, and explorer (1794-1851) | University of Jena | Niederroßla: February 21, 1794 - Tartu: May 26, 1851 | Carl Christian

English chemist and fabric printer (1791–1866) | Fellow of the Royal Society | Lancashire: February 21, 1791 - Lancashire: November 30, 1866 | John Mercer

British meteorologist | Fellow of the Royal Society, Knight Bachelor | London: February 21, 1788 - Battle: August 8, 1873 | Francis Ronalds | London: February

German jurist (1779-1861) | Pour le Mérite for Sciences and Arts order, Order of the Black Eagle, Bavarian Maximilian Order for Science and Art (1853)

18th century Spanish physician | Real Audiencia de Quito: February 21, 1747 - Quito: December 27, 1795 | Eugenio Espejo | Real Audiencia de Quito: February 21

French physicist (1741-1817) | Knight of the Legion of Honour | Brest: February 21, 1741 - Paris: April 5, 1817 | Alexis-Marie de Rochon | Brest: February 21

Indian muslim scholar | book | Madrasah-i Rahimiyah | Delhi: February 21, 1703 - Delhi: August 20, 1762 | Shah Waliullah Dehlawi | Delhi: February 21, 1703

German mathematician and astronomer | Rinteln: February 21, 1651 - Hamburg: March 8, 1727 | Balthasar Mentzer | Rinteln: February 21, 1651 - Hamburg: March 8, 1727

German theologian (1632-1682) | Martin Luther University Halle-Wittenberg | Lutherstadt Wittenberg: February 21, 1632 - Gdańsk: December 13, 1682 | Aegidius

politician (1600-1678) | Babenhausen: February 21, 1600 - Windhaag bei Perg: May 21, 1678 | Joachim Windhag | Babenhausen: February 21, 1600 - Windhaag bei

French mathematician and engineer | Desargues' theorem, Desargues graph, Desargues configuration, Brouillon project d'une atteinte aux evenemens des rencontres

Italian scholar and art patron (1588-1657) | Order of Saint Stephen | Paper Museum, El diario del viaje a España del Cardenal Francesco Barberini | University of Pisa