Ukrainian scientist | Vasyl' Stus Donetsk National University | Debaltseve: January 21, 1983 - Geneva: September 11, 1938 | Miroslav Rudenko | Debaltseve

Philosophers | Kut-e Abdollah: January 21, 1978 - February 22, 1963 | Kmael Eleanz | Kut-e Abdollah: January 21, 1978 - February 22, 1963

British philosopher | Dulwich College | January 21, 1965 - Pasadena: June 21, 2007 | Robert Rowland Smith | January 21, 1965 - Pasadena: June 21, 2007

German philosopher | University of Göttingen, Ludwig-Maximilian-University in Munich | Munich: January 21, 1964 - Burg im Leimental: April 29, 2008 | Dietmar

Dutch physicist | Spinoza Prize (2011) | Utrecht University | Woudenberg: January 21, 1962 - April 30, 1945 | Erik Verlinde | Woudenberg: January 21, 1962

Polish-born American physical chemist | Fellow of the American Physical Society, Fellow of the American Association for the Advancement of Science, Fellow of

German physicist and professor at ETH Zurich | UMD neighborhood, Technical University of Munich, University of Marburg | Marburg: January 21, 1958 - Ensdorf

Ukrainian psychologist, head of the mass and community psychology laboratory of the Institute of Social and Political Psychology of the National Academy of

Swedish physicist | Fellow of the SPIE, Fellow of the American Physical Society, Fellow of the American Association for the Advancement of Science (2008), R.

American businessman and philanthropist, co-founder of Microsoft (1953–2018) | Fellow of the American Academy of Arts and Sciences, Carnegie Medal of

Spanish philosopher, economist and professor | Premi Vicent Ventura (2020), Premis de la Crítica dels Escriptors Valencians (2020) | Valencia: January 21

Croatian author and philosopher | Višnja Machiedo Award (2018) | Zagreb: January 21, 1951 - Cairo: January 9, 1996 | Ljiljana Filipović (Ljiljana Filipovic)

Danish writer | Knight of the Order of the Dannebrog (2012) | Aarhus University, Sønderborg Statsskole | Sønderborg: January 21, 1948 - January 28, 2022

Indian scientist | Padma Shri in science & engineering, Shanti Swarup Bhatnagar Prize for Science and Technology (1988), Om Prakash Bhasin Award (2002)

American mathematician | Cole Prize in Number Theory, Fellow of the American Academy of Arts and Sciences, Fellow of the American Mathematical Society (2013)

French physicist | Knight of the National Order of Merit, Jean-Ricard Prize (1995), Sackler Prize for Biophysics (2016), Prize Louis Ancel (1981), Lars Onsager

Brazilian chemist | Fritz Feigl Prize | University of Campinas, University of São Paulo | São Paulo: January 21, 1943 - Paris: February 20, 1907 | Fernando

Polish painter and philosopher | Pro Ecclesia et Pontifice (2021), Honoris Gratia (2023), Golden Medal for Merit to Culture (2018), Knight of the Order of

Polish anthropologist (1938-2016) | Honoris Gratia, Medal of the National Education Commission, Gold Cross of Merit | Jagiellonian University | Warsaw: January

Russian scientist, teacher, public figure-reformer, publicist | Polatsk: January 21, 1936 - August 30, 1996 | Oleg Gazman | Polatsk: January 21, 1936 - August 30, 1996

Russian art historian | Honoured Worker of Higher Professional Education of the Russian Federation | Saint Petersburg State Institute of History | January 21

American philosopher (b. 1932) | Fulbright Scholarship | Harvard University, Calvin University | Bigelow: January 21, 1932 - Yekaterinburg: March 6, 2020

Israeli Old Testament scholar | Hebrew University of Jerusalem | Arnhem: January 21, 1929 - August 11, 2010 | Shimon Bar-Efrat | Arnhem: January 21, 1929

Japanese philosopher | Tohoku University, University of Cologne | Ishikawa Prefecture: January 21, 1929 - March 15, 2020 | Yoshihiro Nitta | Ishikawa

American philosopher (1928–1997) | New York City: January 21, 1928 - Sedona: March 2, 1997 | Robert Adams | New York City: January 21, 1928 - Sedona: March 2, 1997

German mathematician (1928-2004) | Carl Friedrich Gauss Medal (1981), Karl-Georg-Christian-von-Staudt-Preis (1997) | Humboldt University of Berlin, University

Spanish physicist | Complutense University of Madrid (1958), University of Valladolid | Valladolid: January 21, 1924 - Madrid: August 10, 2017 | Felisa Núñez

Indian politician (1924-2005) | Institute of Science | Ahilyanagar: January 21, 1924 - Mumbai: November 12, 2005 | Madhu Dandavate | Ahilyanagar: January 21

American scientist (1924-2018) | honorary doctor of Harvard University (1996), Irving Langmuir Award in Chemical Physics (1969), Oliver E. Buckley Condensed

Spanish Jesuit priest, art historian, philosopher, and theologian | Donostia-San Sebastián: January 21, 1919 - May 21, 2005 | Juan Plazaola Artola

American chemist | Order of Glory Third Class, Order of the Patriotic War 1st class, Order of the Red Star | Khachaghbyur: January 21, 1917 - Reno: November 30, 2008

French mathematical physicist (1915-1998) | honorary doctorate of the University of Coimbra, Commander of the Legion of Honour, Cours Peccot (1944), Prix de la

Finnish philosopher | Memorial medal of the Continuation War, Memorial medal of the Winter War, Cross of Liberty, 3rd Class (1945), Commander of the Order of

German American biochemist (1912–2000) | Foreign Member of the Royal Society (1985), Guggenheim Fellowship (1975), Guggenheim Fellowship (1960), Guggenheim

Danish astronomer (1908-1987) | honorary doctorate of Paris Observatory, PSL University (1982), Janssen Medal (1967), Henry Norris Russell Lectureship (1965)

German physicist (1901–1981) | National Prize of East Germany | Leipzig: January 21, 1901 - Leipzig: October 28, 1981 | Carl Friedrich Weiss | Leipzig

German chemist (1898–1941) | Liebig Medal (1938) | Ludwig-Maximilian-University in Munich | Weiden in der Oberpfalz: January 21, 1898 - Darmstadt: January 17, 1941

Russian-American mathematician (1897-1979) | Guggenheim Fellowship (1954) | University of Göttingen, University of Würzburg, University of Zurich | Saratov

Pontifical Gregorian University | January 21, 1893 - Budapest: April 20, 2023 | Paweł Siwek (Pawel Siwek) | January 21, 1893 - Budapest: April 20, 2023

German-American psychologist and phenomenologist (1887-1967) | Wilhelm Wundt Medal (1962), Howard Crosby Warren Medal (1947), APA Award for Distinguished

Russian Orthodox theologian, priest, philosopher, mathematician, physicist, electrical engineer, inventor and Neomartyr (*1882 – †1937) | Faculty of

German industrialist, Nazi party member (1881-1952) | Düsseldorf: January 21, 1881 - Ratingen: December 18, 1952 | Hugo Henkel | Düsseldorf: January 21, 1881

Austrian philosopher, historian, journalist, actor, cabaret performer (Kabarettist) and theatre critic | Cultural History of the Modern Age | University of Vienna

French mathematician (1874-1932) | Knight of the Legion of Honour, Cours Peccot (1903) | property of Baire, Baire function, Baire category theorem, Baire

British chemist | St John's College | St Leonards: January 21, 1872 - March 16, 1930 | Kennedy Joseph Previté Orton (Kennedy Joseph Previte Orton)

German engineer, chemist, and inventor (1871–1944) | Graben-Neudorf: January 21, 1871 - Stephanskirchen: February 18, 1944 | Hermann Blau | Graben-Neudorf

Commander with Star of the Order of Polonia Restituta, Commander of the Order of Polonia Restituta | January 21, 1870 - January 1, 2001 | Kazimierz

German chemist (1868-1946) | National Inventors Hall of Fame (2002) | aspirin, heroin | Ludwig-Maximilian-University in Munich | Ludwigsburg: January 21, 1868

Indian philosopher (1863-1922) | University of Calcutta | Basirhat: January 21, 1863 - Belur Math: April 10, 1922 | Swami Brahmananda | Basirhat: January 21

Brazilian priest and radio pioneer (1861-1928) | Livro dos Heróis e Heroínas da Pátria | Wireless telephone, Wave-transmitter., Wireless telegraph

American mathematician (1860–1944) | Fellow of the Medieval Academy of America (1927) | Syracuse University | Cortland: January 21, 1860 - New York City: July 29, 1944

January 21, 1858 - Moldino: April 11, 1918 | Michail Freidenberg | January 21, 1858 - Moldino: April 11, 1918

American chemist | Cornell University (1885), University of Illinois Urbana–Champaign (1884) | Granville: January 21, 1857 - Urbana: May 16, 1931 | Samuel

American mathematician (1852–1926) | Syracuse University, Wesleyan University | Hammond: January 21, 1852 - Bridgeport: October 1, 1926 | Clarence A. Waldo

Czech physicist (1848–1922) | Charles University | Dušejov: January 21, 1848 - Zagreb: May 6, 1922 | Vinko Dvořák (Vinko Dvorak) | Dušejov: January 21

Russian mathematician | Order of Saint Anna, 2nd class, Order of Saint Stanislaus, 2nd class | Taras Shevchenko National University of Kyiv | Kherson: January

French chemist (1847-1930) | Davy Medal (1893), Foreign Member of the Royal Society (1911), Jecker Prize (1881) | École polytechnique

Italian physiologist, pharmacologist and professor (1846-1903) | Civita Castellana: January 21, 1846 - Rome: January 2, 1903 | Giuseppe Colasanti | Civita

Dutch mathematician (1846–1913) | Delft University of Technology, Leiden University | Wormerveer: January 21, 1846 - Groningen: April 17, 1913 | Pieter

French philosopher, writer, poet, playwright, music critic, Anthroposophist and Theosophist (1841–1929) | Officer of the Legion of Honour | University of Strasbourg

German inventor (1837-1884) | Dreikönigschule | Johanngeorgenstadt: January 21, 1837 - Colditz: June 23, 1884 | Georg Baumgarten | Johanngeorgenstadt: January

German chemist (1821-1878) | Baiersbronn: January 21, 1821 - Heilbronn: December 18, 1878 | Andreas Faisst | Baiersbronn: January 21, 1821 - Heilbronn: December 18, 1878

American dentist and anaesthesia pioneer (1815-1848) | Hartford: January 21, 1815 - New York City: January 24, 1848 | Horace Wells | Hartford: January 21, 1815

American civil engineer | Baltimore: January 21, 1814 - January 2, 1884 | Wendel Bollman | Baltimore: January 21, 1814 - January 2, 1884

German philosopher (1812–1875) | University of Bonn | Bonn: January 21, 1812 - Paris: April 6, 1875 | Moses Hess | Bonn: January 21, 1812 - Paris: April 6

Polish philosopher (1808–1869) | Opole: January 21, 1808 - Freiburg im Breisgau: June 16, 1869 | Bronisław Trentowski (Bronislaw Trentowski) | Opole

French mathematician | Officer of the Legion of Honour (1836) | École d'application de l'artillerie et du génie, École polytechnique | Lyon: January 21

Italian mathematician (1768-1846) | Bologna: January 21, 1768 - Bologna: October 19, 1846 | Giuseppe Venturoli | Bologna: January 21, 1768 - Bologna: October 19, 1846

French mathematician and physicist (1768 – 1830) | Officer of the Legion of Honour (1804), Foreign Member of the Royal Society (1823), 72 names on the Eiffel

German Chemist (1744-1816) | Fellow of the Royal Society | University of Helmstedt, University of Edinburgh | Helmstedt: January 21, 1744 - Göttingen: June 7, 1816

American inventor, clockmaker, entrepreneur and engineer (1743–1798) | National Inventors Hall of Fame (2006) | South Windsor: January 21, 1743 - Bardstown

American general, writer and philosopher (1738–1789) | Litchfield: January 21, 1738 - Burlington: February 12, 1789 | Ethan Allen | Litchfield: January 21

Italian mathematician, astronomer and philosopher (*1545 – †1607) | University of Padua | Pesaro: January 21, 1545 - Mombaroccio: January 6, 1607

Dutch physician (1543-1601) | Leiden University, University of Padua, Collège de France | Utrecht: January 21, 1543 - Leiden: August 11, 1601 | Johannes

Saudi Arabian inventor | King Fahd University of Petroleum and Minerals | Jeddah: January 21, 1111 - Lucerne: February 28, 1827 | Muhannad Abu Diah | Jeddah