Felix Klein

Swedish influencer | April 25, 1999 - A Coruña: December 3, 1911 | Eleonora Svanberg | April 25, 1999 - A Coruña: December 3, 1911

Spanish mathematician | Pierre and Marie Curie University, University of Seville, University of Rennes 1 | Córdoba: April 25, 1992 - Aiud: September 10, 1716

russian physicist | Russian Federation President Prize in Science and Innovation for Young Scientists (2020) | Lebedev Physical Institute, National Research

Russian philosopher and journalist | Moscow University's Department of Philosophy | Kemerovo: April 25, 1981 - Israel: May 25, 1953 | Kirill Martynov

businessperson (1980-2014) | Cluses: April 25, 1980 - Magland: August 6, 2014 | Julien Fourgeaud | Cluses: April 25, 1980 - Magland: August 6, 2014

Russian composer and scientist | Medal of Russian Academy of Sciences for Young Scientists in General Physics and Astronomy (2009) | Far Eastern Federal

British inventor | April 25, 1977 - Los Angeles: March 24, 2024 | Mark Champkins | April 25, 1977 - Los Angeles: March 24, 2024

German mathematician | Gay-Lussac-Humboldt-Prize (2009), Karl-Arnold-Preis (2008) | Karlsruhe Institute of Technology | April 25, 1976 - Hurworth-on-Tees: May 20, 1782

German physicist and podcaster | University of Duisburg-Essen | Recklinghausen: April 25, 1974 - Florence: January 23, 1913 | Nicolas Wöhrl (Nicolas Wohrl)

Pakistani scholar | Pride of the Nation Gold Medal Award (2014), Dr. A.Q.Khan Gold Medal (2015), Shandoor Award (2000) | Chitral valley: April 25, 1970

Brazilian priest, recording artist | Paraíso do Norte: April 25, 1969 - Lisbon: February 13, 1734 | Reginaldo Manzotti | Paraíso do Norte: April 25, 1969

American academic | Duke University School of Law, Shaker Heights High School, Duke University | April 25, 1963 - Hampstead: August 18, 1988 | Michael Scharf

Argentinian priest, teacher, and writer, auxiliary vicar of Opus Dei | Pontifical University of the Holy Cross, Facultad de Filosofía y Letras de la

Romanian politician | Bucharest: April 25, 1959 - Schenectady: December 4, 1948 | Varujan Pambuccian | Bucharest: April 25, 1959 - Schenectady: December 4, 1948

Russian philosopher and human rights activist (1959–2010) | Moscow University's Department of Philosophy | Moscow: April 25, 1959 - Moscow: March 14, 2010

philosopher, historian, official representative of the Czech Academy of Sciences | Ostrava: April 25, 1957 - Fahretoft: September 13, 1811 | Pavel Baran

American engineer (born 1955) | Massachusetts Institute of Technology | Oakland: April 25, 1955 - January 1, 1996 | K. Eric Drexler | Oakland: April 25, 1955

English chess player | Oriel College, University of Oxford, Elliott School | London: April 25, 1955 - London: June 10, 1948 | John Nunn | London: April 25

Italian physicist | prix Roberval Grand public (2015) | Kyiv Natural Science Lyceum No. 145, Moscow Institute of Physics and Technology | Kyiv: April 25, 1954

Ukrainian physicist | National Research Nuclear University | Stepanivka: April 25, 1954 - Ufa: August 19, 1994 | Leonid Yatsenko | Stepanivka: April 25, 1954

Scientist | Bhavnagar: April 25, 1953 - Dornecy: July 26, 1893 | Dr. Pankaj S. Joshi (Physicist and Cosmologist) | Bhavnagar: April 25, 1953 - Dornecy: July 26, 1893

Russian scientist | Excellence in Public Education of the RSFSR, Medal of the Order "For Merit to the Fatherland", 2nd class, Honoured Higher education

British mathematician | Fellow of the American Mathematical Society (2013), Albert Leon Whiteman Memorial Prize (2009), EMS Otto Neugebauer Prize (2016)

Professor of moral philosophy | University of Turku | Vaasa: April 25, 1947 - Mito: August 27, 1863 | Timo Airaksinen | Vaasa: April 25, 1947 - Mito: August 27, 1863

Nuclear scientist and metallurgical engineer (1946-2021) | Padma Shri in science & engineering (2005), Shanti Swarup Bhatnagar Prize for Science and Technology (1989)

Czech member of Czech Parliament (2006–2013), physicist, local politician and university educator | Masaryk University | Březolupy: April 25, 1945 - Los

British economist | Fellow of the British Academy, Fellow of the Econometric Society (1980), Commander of the Order of the British Empire, IZA Prize in Labor

American scientist | Fellow of the American Association for the Advancement of Science (2020), IEEE Fellow | City College of New York, James Madison High

scientist | Kaunas: April 25, 1942 - Stuttgart: April 15, 1821 | Vilius Grabauskas | Kaunas: April 25, 1942 - Stuttgart: April 15, 1821

Japanese physicist (1942–2012) | Fellow of the American Association for the Advancement of Science (2007), Benjamin Franklin Medal (1999), Nishina Memorial

Austrian academic | honorary doctorate of Slovak University of Technology in Bratislava (2007), Great Golden Medal of Honour for Services to the Republic of

Italian philosopher | Sapienza University of Rome | Viterbo: April 25, 1940 - November 9, 2024 | Arturo Carsetti | Viterbo: April 25, 1940 - November 9, 2024

Czech (Czechoslovak) palaeobotanist | Faculty of Science, Charles University | Prague: April 25, 1938 - Eichstätt: November 15, 1924 | Milada Vavrdová

American mathematician and hedge fund manager (1938–2024) | Oswald Veblen Prize in Geometry (1976), Giuseppe Motta Medal (2007), 50 Most Influential

Canadian chemist | Officer of the Order of Canada, Claude S. Hudson Award in Carbohydrate Chemistry (1982), Alfred Bader Award (1988), Fellow of the Royal

Canadian-American astronomer & Nobel Laureate in Physics | Shaw Prize, Petrie Prize Lecture (1989), Gruber Prize in Cosmology (2000), The Shaw Prize in

German mathematician and professor (1934-2017) | University of Hamburg | Hamburg: April 25, 1934 - March 6, 2017 | Werner Krabs | Hamburg: April 25, 1934

American chemist (1929–2014) | Fellow of the American Physical Society, Irving Langmuir Award in Chemical Physics (1976), Wolf Prize in Chemistry (1983)

American mathematician (1928-2019) | Fellow of the American Mathematical Society (2013) | University of California, Berkeley | Tono: April 25, 1928 - Seattle

Spanish university teacher and politician (1928-1979) | Civil Order of Alfonso X, the Wise (1967), Grand Cross of the Military Merit - White Badge (1974)

Medal "In Commemoration of the 850th Anniversary of Moscow", Excellence in Public Education of the RSFSR | State University of Education | April 25, 1927

Argentine painter, graphic designer, teacher (1922-2018) | Knight Grand Cross of the Order of Merit of the Italian Republic | Buenos Aires: April 25, 1922

Hindu saint (1922–2001) | India: April 25, 1922 - November 23, 2001 | Krishnananda | India: April 25, 1922 - November 23, 2001

Israeli physicist | Guggenheim Fellowship (1963), Israel Prize (1962) | Queen's University, Columbia University, Gateshead Talmudical College | Vienna: April

American theologian (1916–2001) | University of California, Berkeley, Pacific School of Religion | New York City: April 25, 1916 - Vallecito: February 8, 2001

April 25, 1916 - Sevastopol: April 4, 1978 | Massimo Facchin | April 25, 1916 - Sevastopol: April 4, 1978

German physicist and historian of technology (1912-2003) | Officer's Cross of the Order of Merit of the Federal Republic of Germany | Stuttgart: April 25, 1912

April 25, 1908 - Quezon City: August 6, 2011 | Elios Toschi | April 25, 1908 - Quezon City: August 6, 2011

April 25, 1907 - Mount Athos: January 1, 1028 | Semen Bublyk | April 25, 1907 - Mount Athos: January 1, 1028

American inventor | Hinsdale: April 25, 1906 - Middlebury: January 11, 1982 | A. W. Haydon | Hinsdale: April 25, 1906 - Middlebury: January 11, 1982

Russian mathematician (1903–1987) | Lobachevsky Prize (1986), Helmholtz Medal (1975), Medal "For Valiant Labour in the Great Patriotic War 1941–1945"

Kazakh Soviet therapist | Moscow State University | Omsk: April 25, 1903 - Moscow: June 23, 1971 | Elizaveta Alikhanovna Saduakasova | Omsk: April 25, 1903

Soviet chemist (1902–1988) | USSR State Prize, Hero of Socialist Labour, honorary doctor of the University of Wrocław, Order of the Red Banner of Labour

Polish chemist (1896-1981) | Gold Cross of Merit, Medal of Independence, War Medal 1918-1921, Commemorative badge of the Polish Military Organization, Knight

geologist from Russia | Order of the Red Banner of Labour | Faculty of Physics and Mathematics of Moscow Imperial University, Moscow Practical Academy of

American physician, author, and inventor | Mooers: April 25, 1879 - January 7, 1952 | Emmett Dunn Angell | Mooers: April 25, 1879 - January 7, 1952

American abstract artist and x-ray tube designer | John Scott Award (1898) | Pennsylvania Academy of the Fine Arts | Philadelphia: April 25, 1875

Italian inventor and radio pioneer (1874-1937) | Matteucci Medal (1901), Order of Prince Danilo I, New Jersey Hall of Fame (2009), Order of Saint Anna

University of Geneva, Moscow State University | April 25, 1873 - Katowice: September 3, 1977 | Jonas Šimkus (Jonas Simkus) | April 25, 1873 - Katowice

Greek mathematician | National Technical University of Athens | Berlin: April 25, 1872 - Athens: January 25, 1942 | Nikolaos Hatzidakis - Νικολαος

Italian philosopher and jurist (1872-1952) | University of Turin, University of Messina | Albino: April 25, 1872 - Turin: May 8, 1952 | Gioele Solari | Albino

Italian mathematician (1870-1933) | Sapienza University of Rome | Florence: April 25, 1870 - Rome: February 25, 1933 | Guido Toja | Florence: April 25, 1870

American mathematician (1869–1922) | Washington University in St. Louis, Leipzig University | St. Louis: April 25, 1869 - Cambridge: February 20, 1922

Norwegian professor of chemistry | Fridtjof Nansen Award of Excellence, Mathematics-Natural sciences class (1927) | April 25, 1867 - August 3, 1936 | Claus

Polish lawyer, philosopher, sociologist of law, ethicist and logician | Order of the White Eagle, Order of Saint Stanislaus, Order of Saint Anna | Taras

American inventor and publisher (1867–1934) | St. Louis: April 25, 1867 - January 6, 1934 | Theodore T. Ellis | St. Louis: April 25, 1867 - January 6, 1934

French Esperantist | Fourneyron prize (1898) | École Normale Supérieure | Strasbourg: April 25, 1866 - Annecy: August 12, 1913 | Carlo Bourlet | Strasbourg

April 25, 1866 - Rome: February 26, 1878 | Gëorgia Knap (Georgia Knap) | April 25, 1866 - Rome: February 26, 1878

Spanish politician and professor (1864-1927) | Grand Cross of the Order of Isabella the Catholic (1922) | Barcelona: April 25, 1864 - September 10, 1927

German photochemist, photographer, pioneer in color photography (1862-1927) | honorary citizenship (1924) | University of Göttingen

Serbian philosopher | Belgrade: April 25, 1858 - Belgrade: July 29, 1902 | Ljubomir Nedić (Ljubomir Nedic) | Belgrade: April 25, 1858 - Belgrade: July 29, 1902

British politician | University College School | April 25, 1856 - September 12, 1922 | Lewis Haslam | April 25, 1856 - September 12, 1922 | University College School

Swedish geologist and chemist and the first managing director of LKAB (1855–1926) | Chalmers University of Technology | Ödeborgs Parish: April 25, 1855

American inventor and businessman (1854–1940) | Officier de l'Instruction publique (1889), National Inventors Hall of Fame (2006) | Watertown: April 25, 1854

Swiss chemist and professor (1849-1921) | University of Zurich, Nersisyan School, Heidelberg University | Armenia: April 25, 1849 - Zurich: October 11, 1921

Italian mathematician and railway engineer (1841-1925) | Order of Saints Maurice and Lazarus | University of Turin | Ploaghe: April 25, 1841 - Sassari: September 3, 1925

Italian spiritualist philosopher (1830–1911) | Iseo: April 25, 1830 - Padua: May 13, 1911 | Francesco Bonatelli | Iseo: April 25, 1830 - Padua: May 13, 1911

Dr. phil. Universität Breslau 1849 | University of Wrocław | April 25, 1826 - January 1, 1909 | Oswald Hermes | April 25, 1826 - January 1, 1909 | University

American inventor | West Boylston: April 25, 1820 - January 1, 1901 | Edwin Holmes | West Boylston: April 25, 1820 - January 1, 1901

French printer (1817–1879) | Au clair de la lune | Paris: April 25, 1817 - Paris: April 26, 1879 | Édouard-Léon Scott de Martinville (Edouard-Leon Scott de

German philosopher (1816-1888) | University of Kiel | Flensburg: April 25, 1816 - Basel: December 11, 1888 | Karl Steffensen | Flensburg: April 25, 1816

French chemist (1812–1893) | Arc College (Dole) | Poligny: April 25, 1812 - Saint-Lothain: August 22, 1893 | Charles Sauria | Poligny: April 25, 1812

Swiss historian (1793-1866) | Beromünster: April 25, 1793 - Lucerne: October 25, 1866 | Joseph Eutych Kopp | Beromünster: April 25, 1793 - Lucerne: October 25, 1866

British churchman and poet (1792–1866) | Corpus Christi College | Fairford: April 25, 1792 - Bournemouth: March 29, 1866 | John Keble | Fairford: April 25

Norwegian politician (1770-1850) | Knight of the Order of the Polar Star (1818), Commander of the Order of St. Olav (1847) | University of Copenhagen | April

Italian mathematician (1763-1845) | Monte Compatri: April 25, 1763 - Rome: March 3, 1845 | Marco Mastrofini | Monte Compatri: April 25, 1763 - Rome: March 3, 1845

German chemist (1757-1804) | University of Göttingen | Göttingen: April 25, 1757 - Saint Petersburg: December 7, 1804 | Johann Tobias Lowiz | Göttingen

jurist from the Principality of Neuchâtel | University of Basel | Couvet: April 25, 1714 - Neuchâtel: December 28, 1767 | Emerich de Vattel | Couvet: April

German astronomer, mathematician and cartographer (*1495 – †1552) | Astronomicum Caesareum, Cosmographicus liber | Leipzig University, University of Vienna

Roman emperor from 161 to 180 and Stoic philosopher | Meditations | Rome: April 25, 0121 - Vindobona: March 16, 0180 | Marcus Aurelius - Marcus Catilius