Hugh Longbourne Callendar

Polish physicist, sociologist and social activist | Faculty of Philosophy and Sociology, University of Warsaw, VI Liceum Ogólnokształcące im. Tadeusza

Estonian philosopher | University of Tartu, Hugo Treffner Gymnasium | Tartu: April 18, 1973 - August 17, 2023 | Roomet Jakapi | Tartu: April 18, 1973 - August

American actress | University of Wisconsin–Madison, Evanston Township High School | Evanston: April 18, 1971 - Budapest: September 1, 1936 | Tamara Braun

Austrian physicist and professor at the Swiss Federal Institute of Technology (ETH) Zurich | Aneesur Rahman Prize for Computational Physics (2016) | ETH Zurich

researcher | Prize of Castile and Leon for scientific, technical and innovative research (2021) | University of Salamanca (1987), University College London

scientist | Moscow University's Department of Philosophy | Dushanbe: April 18, 1963 - Dushanbe: January 19, 2015 | Soukhrob Charipov | Dushanbe: April 18, 1963

French mathematician, logician and computer scientist | ACM Software System Award (2013) | École Normale Supérieure | Isère: April 18, 1961 - Auburn: May 13, 1944

Latvian scientist | April 18, 1960 - Baku: July 17, 2021 | Dace Bula | April 18, 1960 - Baku: July 17, 2021

American mathematician | Nemmers Prize in Mathematics (2014), Oswald Veblen Prize in Geometry (2001), Fellow of the American Mathematical Society (2021)

scientist | Moscow State Institute of Electronics and Mathematics | Soviet Union: April 18, 1958 - July 12, 2017 | Sergei Pavlovich Rastorguev | Soviet Union

Russian aircraft engineer, scientist | Order of Alexander Nevsky, State Prize of the Russian Federation in Literature and the Arts, Russian Federation

Canadian chemist | Earle K. Plyler Prize for Molecular Spectroscopy (2025), Centenary Prize (2016), Guggenheim Fellowship, honorary doctorate from the

Polish chemist | Adam Mickiewicz University in Poznań | Poznań: April 18, 1956 - Chatham: January 1, 1902 | Mirosław Dworniczak (Miroslaw Dworniczak)

Lithuanian politician and swimmer | Vilnius University | Vilnius: April 18, 1956 - Paris: April 12, 1871 | Arvydas Juozaitis | Vilnius: April 18, 1956 - Paris

researcher | National University of Kharkiv | Murafa: April 18, 1950 - October 28, 2020 | S. Ivakhnenko | Murafa: April 18, 1950 - October 28, 2020 | National

Ukrainian translator | Chernivtsi: April 18, 1949 - October 19, 2019 | Olha Kocherha | Chernivtsi: April 18, 1949 - October 19, 2019

American mathematician | Wolf Prize in Mathematics (2017), Stefan Bergman Prize (1992), Bôcher Memorial Prize (2008), Alan T. Waterman Award (1976), Fields

Russian chemist | State Prize of the Russian Federation, Order of Alexander Nevsky, Medal of Francysk Skaryna, Global Energy Prize (2016), Order "For Merit to

German chemist | Gay-Lussac-Humboldt-Prize (1989), honorary doctor of the University of Rennes I (2003), Bavarian Maximilian Order for Science and Art (2012)

Russian mathematician | Excellence in Public Education of the RSFSR, Merited Scientist of the Russian Federation (2009), Russian President's Prize in the field

Russian mathematician | The EMET Prize for Art, Science and Culture (2016), Fellow of the American Mathematical Society (2013), Israel Prize (2004)

French physicist | Jean-Perrin Prize (1980), Chevalier des Arts et des Lettres | École Normale Supérieure, University of Paris, University of Paris-Sud

British physicist (1938–2017) | University of Liverpool | Waterloo: April 18, 1938 - Pari: June 6, 2017 | F. David Peat | Waterloo: April 18, 1938 - Pari: June 6, 2017

Musical instrument inventor (1937–2016) | Guggenheim Fellowship | Berklee College of Music | South Gate: April 18, 1937 - Berkeley: September 14, 2016 | Don

German phytomedicine and plant virologist (1937-2014) | Aschersleben: April 18, 1937 - November 15, 2014 | Gerhard Proeseler | Aschersleben: April 18, 1937

Czech philosopher (1936–2021) | Cross of the President of the Slovak Republic, 1st Class (2003), honorary citizen of Prague 6 (2014), Order of Tomáš

German physicist (1933–2020) | Robert Wichard Pohl Prize (1990), Herbert Walther Prize (2015) | University of Bonn | Hindenburg: April 18, 1933 - Hamburg

Belarusian scientist | Jubilee Medal "In Commemoration of the 100th Anniversary of the Birth of Vladimir Ilyich Lenin", Diploma of the Supreme Soviet of the

Ukrainian educator | Jubilee Medal "In Commemoration of the 100th Anniversary of the Birth of Vladimir Ilyich Lenin", Excellence in People's Education of the

American political scientist (1927-2008) | Fellow of the American Academy of Arts and Sciences, Grawemeyer Awards (1992), Guggenheim Fellowship | Clash of

Moscow University's Department of Philosophy | April 18, 1926 - Richmond Hill: November 18, 1956 | Arseny Chanyshev | April 18, 1926 - Richmond Hill

American television meteorologist | University of Tulsa | Medford: April 18, 1926 - Des Plaines: August 20, 2015 | Harry Volkman | Medford: April 18, 1926

Italian partisan and chemist | Naples: April 18, 1922 - Monterotondo: March 14, 1976 | Tullio Pietrocola | Naples: April 18, 1922 - Monterotondo: March 14, 1976

Inventor of Active Matrix technology (1920–2011) | Charles Stark Draper Prize (2012) | University of London | Budapest: April 18, 1920 - Pittsburgh: September 18, 2011

American physicist (1911-2011) | Fellow of the American Physical Society, Wolf Prize in Physics (1991), Enrico Fermi Award (1998), Tom W. Bonner Prize in

Finnish mathematician (1907-1996) | Leroy P. Steele Prize (1982), Wolf Prize in Mathematics (1981), Guggenheim Fellowship (1971), Fields medal (1936)

Japanese philosopher (1905-1993) | Order of the Sacred Treasure, 3rd class | Kyoto University | Yamagata: April 18, 1905 - July 7, 1993 | Iwao Kōyama (Iwao

Nobel Prize-winning American physician | Foreign Member of the Royal Society (1974), Canada Gairdner International Award (1968), Nobel Prize in Physiology or

Portuguese politician (1901-1948) | Grand Officer of the Order of Liberty, Grand Cross of the Military Order of Saint James of the Sword | Technical University of Lisbon

writer and painter from Korea (1896-1948) | Tokyo University of the Arts | Suwon: April 18, 1896 - Seoul: December 10, 1948 | Na Hye-sok | Suwon: April 18

honorary doctor of Alexandru Ioan Cuza University | April 18, 1895 - Ann Arbor: November 26, 1943 | André Félix Boivin (Andre Felix Boivin) | April 18

Ph.D. Universiteit van Amsterdam 1923 | University of Amsterdam | April 18, 1892 - August 13, 2020 | Willem de Groot | April 18, 1892 - August 13, 2020

American mechanical engineer (1892-1962) | Howard N. Potts Medal (1948), E. V. Murphree Award in Industrial and Engineering Chemistry (1962), John Scott Award

Russian mathematician (1892 – 1988) | Order of Friendship of Peoples, Order of the October Revolution, Order of the Red Banner of Labour, Stalin Prize, Order

Dutch mathematician | University of Amsterdam | Nijmegen: April 18, 1882 - Bergen-Belsen concentration camp: February 8, 1945 | Julius Wolff (Jules Wolff)

Austro-Hungarian physicist | Humboldt University of Berlin | Lviv: April 18, 1882 - Charlotte Amalie: August 28, 1963 | Julius Edgar Lilienfeld | Lviv: April

mathematician, teacher, politician (1880-1942) | Devecser: April 18, 1880 - Cluj-Napoca: October 29, 1942 | Márk Antal (Mark Antal) | Devecser: April 18, 1880

French Russian lawyer (1877-1957) | Knight of the Legion of Honour | Moscow Imperial University, Faculty of Law | Moscow: April 18, 1877 - Paris: November 9, 1957

Russian mathematician (1877-1943) | Bestuzhev Courses, University of Göttingen | Ulyanovsk: April 18, 1877 - Saint Petersburg: June 24, 1943 | Nadezhda Gernet

Italian mathematician (1875-1957), father of Edoardo Amaldi | Mathematical Prize of the Italian Academy of Sciences (1918) | University of Bologna | Verona

American chemist (1868–1954) | Priestley Medal (1938), honorary doctorate from Columbia University (1929), American Institute of Chemists Gold Medal (1936)

Czech translator, writer and roman catholic priest (1862-1938) | Přemyslovice: April 18, 1862 - Brno: April 7, 1938 | Pavel Julius Vychodil | Přemyslovice

Russian psychiatrist (1849–1889) | Imperial Moscow University | Transbaikal Oblast: April 18, 1849 - Saint Petersburg: July 15, 1889 | Victor Kandinsky

German wireless pioneer (1849-1913) | Grashof Commemorative Medal (1902) | Technische Universität Berlin, University of Erlangen–Nuremberg, University of Jena

Pakistani philosopher | April 18, 1844 - September 25, 1929 | Syed Mir Hassan | April 18, 1844 - September 25, 1929

Portuguese poet (1842–1891) | University of Coimbra | Ponta Delgada: April 18, 1842 - Ponta Delgada: September 11, 1891 | Antero de Quental | Ponta Delgada

Order of Saint Anna, 1st class | Faculty of Physics and Mathematics of the Saint Petersburg University | April 18, 1839 - January 1, 1627 | Vasily Isachenko

April 18, 1838 - Warsaw: September 12, 1983 | Alois Jandouš (Alois Jandous) | April 18, 1838 - Warsaw: September 12, 1983

French chemist (1838–1912) | Davy Medal (1879), Knight of the Legion of Honour | École polytechnique | Cognac: April 18, 1836 - Paris: May 28, 1912

Gymnasium Paulinum, University of Bonn, Frederick William University Berlin | April 18, 1836 - Cambridge: January 19, 2016 | Eduard Ketteler | April 18

Olonetsk Theological Seminary | April 18, 1832 - San Francisco: February 2, 2021 | Ivan Yegorovich Troitsky | April 18, 1832 - San Francisco: February 2, 2021

Czech member of Czech council and philosopher | Štěkeň: April 18, 1831 - Padařov: November 8, 1913 | Alfons Ferdinand Šťastný (Alfons Ferdinand Stastny)

botanist (1822-1905) | University of Geneva, University of Strasbourg | Nyon: April 18, 1822 - Eaux-Vives: January 17, 1905 | Marc Thury | Nyon: April 18, 1822

British philosopher (1817-1878) | London: April 18, 1817 - London: November 30, 1878 | George Henry Lewes | London: April 18, 1817 - London: November 30, 1878

botanist (1816-1860) | Knight of the Legion of Honour | Paris: April 18, 1816 - Paris: March 22, 1860 | Louis de Vilmorin | Paris: April 18, 1816 - Paris: March 22, 1860

18 Apr 1811 - 25 Feb 1872 | April 18, 1811 - February 25, 1872 | Leonard H. Wheeler | April 18, 1811 - February 25, 1872

President of the University of Michigan | Doctor of Divinity (1845) | Union College | Rhinebeck: April 18, 1805 - Vevey: November 15, 1881 | Henry Philip

British inventor, built first electric locomotive (1804–1894) | University of Aberdeen, Marischal College | Aberdeen: April 18, 1804 - Aberdeen: November 16, 1894

Italian physicist (1791-1863) | Knight of the Order of Saint Joseph, Commander of the Order of Saints Maurice and Lazarus, Civil Order of Savoy | University of Pavia

British economist and politician (1772–1823) | Talmud Torah school | London: April 18, 1772 - Gloucestershire: September 11, 1823 | David Ricardo | London

Swedish writer | University of Greifswald | Svarteborg: April 18, 1759 - Greifswald: October 1, 1808 | Thomas Thorild | Svarteborg: April 18, 1759

French protestant divine | Nîmes: April 18, 1640 - Berlin: April 6, 1725 | Étienne Chauvin (Etienne Chauvin) | Nîmes: April 18, 1640 - Berlin: April 6, 1725

Italian polyhistor (1541-1593) | University of Pisa | San Miniato: April 18, 1541 - Rome: June 25, 1593 | Michele Mercati | San Miniato: April 18, 1541 - Rome

Persian mathematician and engineer (c. 953 – c. 1029) | Al-Fakhri | Karaj: April 18, 0953 - January 1, 1029 | Al-Karaji | Karaj: April 18, 0953 - January 1