| Scientist | 
	Year | 
	Milestone | 
	| Abdullin, F. Sh. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Abelson, Philip | 
	1940 | 
	Neptunium
	(atomic number 93) | 
	| Adams, John Couch | 
	1846 | 
	Discovery of Neptune | 
	| Aepinus, Franz | 
	1756 | 
	Pyroelectricity | 
	| Jabir ibn Aflah | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Agassiz, Louis | 
	1840 | 
	Ice age | 
	| Agricola, Georgius | 
	1529 | 
	Fluorine
	(atomic number 9) | 
	| 1548 | 
	Bismuth
	(atomic number 83) | 
	| Akap’ev, G. N. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Alberti, Leon Battista | 
	1413 - 1420 | 
	Perspective | 
	| Al-Biruni | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| D’Alembert, Jean le Rond | 
	1752 | 
	D’Alembert’s paradox | 
	| Alexanderson, Ernst | 
	1904 | 
	Alexanderson alternator | 
	| Alfvén, Hannes | 
	1942 | 
	Alfvén wave | 
	| 1971 | 
	Plasma cosmology | 
	| Alhazen
(Abū-‘Alī al-Ḥasan ibn al-Ḥasan ibn al-Ḥaytham) | 
	1025 | 
	Optics | 
	| Allen, John F. | 
	1937 | 
	Superfluidity | 
	| Ismail al-Jazari | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Jamshīd al-Kāshī | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| al-Khwārizmī, Muḥammad ibn Mūsā | 
	820 | 
	Algebra | 
	| Alonso, Carol T. | 
	1974 | 
	Seaborgium
	(atomic number 106) | 
	| Alonso, José R. | 
	1974 | 
	Seaborgium
	(atomic number 106) | 
	| Abū Ishāq Ibrāhīm al-Zarqālī | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Alter, David | 
	1833 | 
	Electrical telegraph | 
	| Amontons, Guillaume | 
	1699 | 
	Tribology | 
	| Ampère, André-Marie | 
	1810 | 
	Fluorine
	(atomic number 9) | 
	| 1811 | 
	Iodine
	(atomic number 53) | 
	| 1820 | 
	Electromagnetism | 
	| Anderson, Carl David | 
	1932 | 
	Antimatter | 
	| 1932 - 1951 | 
	Positronium | 
	| 1936 | 
	Muon | 
	| de Andrada, José Bonifácio | 
	1817, 1821 | 
	Lithium
	(atomic number 3) | 
	| Antheil, George | 
	1942 | 
	Frequency-hopping | 
	| Antonelli, Kathleen | 
	1946 | 
	ENIAC | 
	| Apollonius of Perga | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Arago, François | 
	1819 | 
	Wave optics | 
	| Archimedes | 
	260 BCE | 
	Mechanical advantage | 
	| Arfwedson, Johan August | 
	1817, 1821 | 
	Lithium
	(atomic number 3) | 
	| Aristotle | 
	335 BCE | 
	Science | 
	| Armbruster, Peter | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| 1982 | 
	Meitnerium
	(atomic number 109) | 
	| 1984 | 
	Hassium
	(atomic number 108) | 
	| 1994 | 
	Darmstadtium
	(atomic number 110) | 
	| 1994 | 
	Roentgenium
	(atomic number 111) | 
	| 1996 | 
	Copernicium
	(atomic number 112) | 
	| Arrhenius, Svante | 
	1896 | 
	Arrhenius equation | 
	| Aserinsky, Eugene | 
	1953 | 
	Rapid-eye-movement sleep | 
	| Asperger, Hans | 
	1938, 1943 | 
	Autism | 
	| Assmann, Richard | 
	1902 | 
	Stratosphere | 
	| Aston, Francis William | 
	1922 | 
	Isotope | 
	| Avery, Oswald | 
	1944 | 
	Molecular genetics | 
	| Avicenna (Ibn-Sīnā) | 
	1025 | 
	The Canon of Medicine | 
	| Avogadro, Amedeo | 
	1811, 1909 | 
	Avogadro constant | 
	| Baade, Walter | 
	1918 | 
	The universe | 
	| 1933 | 
	Neutron star | 
	| Babbage, Charles | 
	1822 | 
	Difference engine | 
	| 1946 | 
	Computer | 
	| Bacon, Francis | 
	1605 | 
	Binary number | 
	| 1605 | 
	Bacon’s cipher | 
	| 1620 | 
	Scientific method | 
	| Baekeland, Leo | 
	1907 | 
	Bakelite | 
	| von Baer, Karl Ernst | 
	1826 | 
	Eggs and embryos | 
	| Bailey, P. D. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Balard, Antoine Jérôme | 
	1825, 1826 | 
	Bromine
	(atomic number 35) | 
	| Baltimore, David | 
	1970 | 
	Reverse transcriptase | 
	| Banting, Frederick | 
	1921 | 
	Insulin | 
	| Bardeen, John | 
	1947 | 
	Transistor
 | 
	| 1957 | 
	BCS theory | 
	| Barger, George | 
	1914 | 
	Neurotransmitters | 
	| Barish, Barry C. | 
	1967 | 
	LIGO | 
	| Barkhausen, Heinrich | 
	1919 | 
	Barkhausen effect | 
	| Barnes, Charles C. | 
	1874 | 
	Rotary vane pump | 
	| Barnett, William | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Barrow, Isaac | 
	1668, 1669 | 
	Fundamental theorem of calculus | 
	| Barsanti, Eugenio | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Bartholin, Rasmus | 
	1669 | 
	Birefringence | 
	| Bartik, Jean | 
	1946 | 
	ENIAC | 
	| Bates, Henry Walter | 
	1861 | 
	Batesian mimicry | 
	| Bateson, William | 
	1904 | 
	Genetic linkage | 
	| Bayes, Thomas | 
	1763 | 
	Bayes’ theorem | 
	| Becquerel, Henri | 
	1896 | 
	Radioactivity | 
	| von Behring, Emil | 
	1890 | 
	Antitoxins | 
	| Beijerinck, Martinus | 
	1898 | 
	Viruses | 
	| Bell, Alexander Graham | 
	1876 | 
	Telephone | 
	| Bellaso, Giovan Battista | 
	118 BCE - 1953 | 
	Cipher: Vigenère cipher | 
	| Belousov, Boris Pavlovich | 
	1951 | 
	Chemical oscillations | 
	| van Beneden, Edouard | 
	1878 | 
	Mitosis | 
	| Benz, Karl | 
	1885 | 
	Automobile | 
	| Berg, Otto | 
	1908, 1925 | 
	Rhenium
	(atomic number 75) | 
	| Bergman, Torbern | 
	1770 - 1774 | 
	Manganese
	(atomic number 25) | 
	| 1781, 1783 | 
	Tungsten
	(atomic number 74) | 
	| Bernard, Claude | 
	1865 | 
	Regulating the body | 
	| Bernoulli, Daniel | 
	1738 | 
	Bernoulli’s principle | 
	| Bernoulli, Jacob | 
	1683 | 
	Euler’s number | 
	| Bertillon, Alphonse | 
	1893 | 
	Anthropometry | 
	| Berzelius, Jöns Jacob | 
	1789, 1824 | 
	Zirconium
	(atomic number 40) | 
	| 1791 - 1910 | 
	Titanium
	(atomic number 22) | 
	| 1803 | 
	Cerium
	(atomic number 58) | 
	| 1813 | 
	Chemical nomenclature | 
	| 1817 | 
	Lithium
	(atomic number 3) | 
	| 1817 | 
	Selenium
	(atomic number 34) | 
	| 1823 | 
	Silicon
	(atomic number 14) | 
	| 1829 | 
	Thorium
	(atomic number 90) | 
	| 1830 | 
	Vanadium
	(atomic number 23) | 
	| 1841 | 
	Allotropy | 
	| Bessel, Friedrich | 
	1838 | 
	Distance to a star | 
	| Best, Charles Herbert | 
	1921 | 
	Insulin | 
	| Bethe, Hans | 
	1920 | 
	Stellar evolution | 
	| 1948 | 
	Quantum electrodynamics | 
	| Bhāskara II | 
	285 | 
	Diophantine equation | 
	| Binet, Alfred | 
	1904 | 
	Intelligence testing | 
	| Birkeland, Kristian | 
	1784, 1903 | 
	Birkeland-Eyde process | 
	| 1908 | 
	Birkeland current | 
	| 1908 - 1958 | 
	Van Allen belts | 
	| Bi Sheng | 
	1040 | 
	Movable-type printing | 
	| Bishop, Katharine | 
	1913 - 1930 | 
	Vitamin discoveries: E | 
	| Bjerknes, Jacob | 
	1920 | 
	Weather forecasting | 
	| Bjerknes, Vilhelm | 
	1920 | 
	Weather forecasting | 
	| Black, Joseph | 
	1755 | 
	Magnesium
	(atomic number 12) | 
	| 1761 | 
	Latent heat | 
	| Blackburn, Elizabeth | 
	1971 - 1977 | 
	Telomere | 
	| Bloch, Felix | 
	1930 | 
	Magnon | 
	| 1930 - 2014 | 
	Quasiparticles: Magnon | 
	| Blomstrand, Christian Wilhelm | 
	1801 | 
	Niobium
	(atomic number 41) | 
	| Blumenbach, Johann Friedrich | 
	1790, 1808 | 
	Strontium
	(atomic number 38) | 
	| Bodamer, Joachim | 
	1947 | 
	Prosopagnosia | 
	| Bogomolov, Sergey L. | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| 2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| Bohr, Niels | 
	1913 | 
	Atom | 
	| 1913 | 
	Bohr magneton | 
	| de Boisbaudran, Paul-Émile Lecoq  | 
	1875 | 
	Gallium
	(atomic number 31) | 
	| 1879 | 
	Samarium
	(atomic number 62) | 
	| 1886 | 
	Dysprosium
	(atomic number 66) | 
	| 1890 - 1901 | 
	Europium
	(atomic number 63) | 
	| Bohm, David | 
	1930 - 2014 | 
	Quasiparticles: Plasmon | 
	| Bolyai, János | 
	1829 | 
	Non-Euclidean geometry | 
	| Bolton, John | 
	1962 - 1964 | 
	Quasar | 
	| Boltwood, Bertram | 
	1907 | 
	Dating rocks | 
	| Boltzmann, Ludwig | 
	1879 | 
	Stefan-Boltzmann law | 
	| 1908 | 
	Brownian motion | 
	| Bonner, John Tyler | 
	1947 | 
	Slime-mold bodies | 
	| Boole, George | 
	1847 | 
	Boolean algebra | 
	| Bose, Satyendra Nath | 
	1925 | 
	Bose-Einstein condensate | 
	| Böttger, Rudolf Christian | 
	1846 | 
	Guncotton | 
	| Boveri, Theodor | 
	1902 | 
	Boveri-Sutton chromosome theory | 
	| Boyle, Robert | 
	1661 | 
	Chymistry | 
	| 1662 | 
	Boyle’s law | 
	| Bradley, James | 
	1729 | 
	Aberration of light | 
	| Brahe, Tycho | 
	1572 | 
	Supernova | 
	| Brahmagupta | 
	628 | 
	Diophantine equation: Pell’s equation | 
	| 628 | 
	Zero | 
	| Braid, James | 
	1852 - 1854 | 
	Ideomotor phenomenon | 
	| Brainerd, John Grist | 
	1946 | 
	ENIAC | 
	| Brand, Hennig | 
	1669 | 
	Phosphorus
	(atomic number 15) | 
	| Brande, William Thomas | 
	1817, 1821 | 
	Lithium
	(atomic number 3) | 
	| Brandt, Georg | 
	1735 | 
	Cobalt
	(atomic number 27) | 
	| Branly, Edouard | 
	1890 | 
	Coherer | 
	| Brattain, Walter Houser | 
	1947 | 
	Transistor | 
	| Braun, Karl Ferdinand | 
	1874, 1904 | 
	Crystal diode | 
	| 1905 | 
	Phased array | 
	| Brickwedde, Ferdinand | 
	1931 | 
	Deuterium | 
	| Bridges, Calvin | 
	1910 | 
	Genes | 
	| van den Brink, Jeroen | 
	1930 - 2014 | 
	Quasiparticles: Orbiton | 
	| Broca, Paul | 
	1861 | 
	Mapping speech | 
	| van den Broek, Antonius | 
	1911 | 
	Atomic number | 
	| de Broglie, Louis | 
	1925 | 
	Wave-particle duality | 
	| Brouncker, William | 
	285 | 
	Diophantine equation: Pell’s equation | 
	| Brown, Robert | 
	1831 | 
	Cell | 
	| 1908 | 
	Brownian motion | 
	| Brown, Samuel | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Brown, William C. | 
	1964 | 
	Rectenna | 
	| Brownrigg, William | 
	1750 | 
	Platinum
	(atomic number 78) | 
	| Brugmans, Sebald Justinus | 
	1778, 1845 | 
	Diamagnetism | 
	| Buklanov, German Vladimirovich | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| 2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| Brunelleschi, Filippo | 
	1413 - 1420 | 
	Perspective | 
	| Bunsen, Robert | 
	1855 | 
	Bunsen burner | 
	| 1859 | 
	Analytical spectroscopy | 
	| 1860, 1882 | 
	Caesium
	(atomic number 55) | 
	| 1861 | 
	Rubidium
	(atomic number 37) | 
	| Burnell, Jocelyn Bell | 
	1967 | 
	Pulsar | 
	| Burnet, Frank Macfarlane | 
	1949 | 
	Immune tolerance | 
	| Bussy, Antoine | 
	1828 | 
	Beryllium
	(atomic number 4) | 
	| Butenandt, Adolf | 
	1959 | 
	Pheromone | 
	| Bütschli, Otto | 
	1878 | 
	Mitosis | 
	| Byrne, John F. (links to Chaocipher) | 
	118 BCE - 1953 | 
	Cipher: Chaocipher | 
	| Caesar, Julius | 
	118 BCE - 1953 | 
	Cipher: Caesar cipher | 
	| 46 BCE | 
	Julian calendar | 
	| Cai Lun | 
	105 | 
	Paper | 
	| y Cajal, Santiago Ramón | 
	1889 | 
	Nervous system | 
	| Camerarius, Rudolf Jakob | 
	1694 | 
	Plant sexuality | 
	| Calmette, Albert | 
	1895 | 
	Antivenom | 
	| 1921 | 
	Tuberculosis vaccine | 
	| Calvin, Melvin | 
	1946 | 
	Photosynthesis | 
	| Campbell, George Ashley | 
	1899 | 
	Loading coil | 
	| Carnot, Nicolas Léonard Sadi | 
	1847 | 
	Laws of thermodynamics | 
	| Carothers, Wallace | 
	1935 | 
	Nylon | 
	| Carpenter, William Benjamin | 
	1852 - 1854 | 
	Ideomotor phenomenon | 
	| Carré, Ferdinand and Edmond | 
	1805 - 1876 | 
	Vapor-compression refrigeration | 
	| Casimir, Hendrik | 
	1948 | 
	Casimir effect | 
	| Cassini, Giovanni Domenico | 
	1671 | 
	Planetary distances | 
	| Cavendish, Henry | 
	1781 | 
	Electric conductivity | 
	| 1784 | 
	Hydrogen and water
	(atomic number 1) | 
	| 1784, 1903 | 
	Birkeland-Eyde process | 
	| 1798 | 
	‘Weighing’ the world | 
	| Celsius, Anders | 
	1742 | 
	Centigrade scale | 
	| Chadwick, James | 
	1932 | 
	Neutron | 
	| Champollion, Jean François | 
	1822 | 
	Deciphering hieroglyphics | 
	| Chandrasekhar, Subrahmanyan | 
	1931 | 
	White dwarfs | 
	| Chang, Min Chueh | 
	1944 - 1960 | 
	The pill | 
	| Chatton, Édouard | 
	1925, 1962 | 
	Prokaryote and eukaryote | 
	| Chelnokov, L. P. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Chelnokov, M. L. | 
	1999-2007 | 
	Flerovium
	(atomic number 114) | 
	| Chepigin, Victor Ivanovich | 
	1999-2007 | 
	Flerovium
	(atomic number 114) | 
	| Chevreul, Michel Eugène | 
	1852 - 1854 | 
	Ideomotor phenomenon | 
	| Cherenkov, Pavel | 
	1934 | 
	Cherenkov radiation | 
	| Chinese, Han dynasty | 
	206 BCE | 
	Compass | 
	| 200 | 
	Woodblock printing | 
	| Chinese, Tang dynasty | 
	9th century | 
	Gunpowder | 
	| 10th century | 
	Rocket | 
	| Choppin, Gregory R. | 
	1955 | 
	Mendelevium
	(atomic number 101) | 
	| Christie, Samuel Hunter | 
	1833, 1843 | 
	Wheatstone bridge | 
	| Christin, Jean-Pierre | 
	1742 | 
	Centigrade scale | 
	| Chua, Leon | 
	1971 | 
	Memristor | 
	| Claus, Karl Ernst | 
	1844 | 
	Ruthenium
	(atomic number 44) | 
	| Clausius, Rudolf | 
	1847 | 
	Laws of thermodynamics | 
	| Cleve, Per Teodor | 
	1868 - 1895 | 
	Helium
	(atomic number 2) | 
	| 1878 - 1879 | 
	Holmium
	(atomic number 67) | 
	| 1879 | 
	Thulium
	(atomic number 69) | 
	| Coandă, Henri | 
	1934 | 
	Coandă effect | 
	| Cohen, Stanley | 
	1952 | 
	Nerve growth | 
	| Colton, Frank B. | 
	1944 - 1960 | 
	The pill | 
	| Compton, Arthur Holly | 
	1923 | 
	Compton scattering | 
	| Conway, John Horton | 
	1970 | 
	Conway’s Game of Life | 
	| Cooke, William Fothergill | 
	1838 | 
	Electrical telegraph | 
	| Cooper, Leon | 
	1930 - 2014 | 
	Quasiparticles: Cooper pair | 
	| 1956 | 
	Cooper pair | 
	| 1957 | 
	BCS theory | 
	| Corson, Dale R. | 
	1940 | 
	Astatine
	(atomic number 85) | 
	| Coryell, Charles D. | 
	1945 | 
	Promethium
	(atomic number 61) | 
	| Coster, Dirk | 
	1923 | 
	Hafnium
	(atomic number 72) | 
	| Copernicus, Nicolaus | 
	1543 | 
	Heliocentrism | 
	| de Coriolis, Gaspard-Gustave | 
	1835 | 
	Coriolis effect | 
	| Cotton, Aimé | 
	1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| de Coulomb, Charles-Augustin | 
	1785 | 
	Coulomb’s law | 
	| Courtois, Bernard | 
	1811 | 
	Iodine
	(atomic number 53) | 
	| Courtenay-Latimer, Marjorie | 
	1938 | 
	Coelacanth | 
	| Cowan, Clyde | 
	1956 | 
	Neutrino | 
	| Cranston, John Arnold | 
	1913 - 1918 | 
	Protactinium
	(atomic number 91) | 
	| Crawford, Adair | 
	1790, 1808 | 
	Strontium
	(atomic number 38) | 
	| Crick, Francis | 
	1953 | 
	DNA structure | 
	| Cronin, James | 
	1964 | 
	CP violation | 
	| Cronstedt, Axel Fredrik | 
	1751 | 
	Nickel
	(atomic number 28) | 
	| Crookes, William | 
	1861 - 1862 | 
	Thallium
	(atomic number 81) | 
	| 1869 - 1875 | 
	Crookes tube | 
	| 1873 | 
	Crookes radiometer | 
	| 1903 | 
	Spinthariscope | 
	| Cruikshank, William | 
	1790, 1808 | 
	Strontium
	(atomic number 38) | 
	| Curie, Jacques | 
	1880, 1881 | 
	Piezoelectricity | 
	| Curie, Marie | 
	1896 | 
	Radioactivity | 
	| Curie, Pierre  | 
	1880, 1881 | 
	Piezoelectricity | 
	| 1896 | 
	Radioactivity | 
	| 1898 | 
	Polonium
	(atomic number 84) | 
	| 1898 | 
	Radium
	(atomic number 88) | 
	| 1899 - 1910 | 
	Radon
	(atomic number 86) | 
	| Curl, Robert | 
	1952 - 1991 | 
	Fullerene | 
	| de Cusa, Nicolaus | 
	1450, 1481 | 
	Hygrometer | 
	| Cuvier, Georges | 
	1796 | 
	Comparative anatomy | 
	| Dale, Henry Hallett | 
	1914 | 
	Neurotransmitters | 
	| Dalton, John | 
	1808 | 
	Atomic theory | 
	| Dam, Henrik | 
	1913 - 1930 | 
	Vitamin discoveries: K | 
	| Daniell, John Frederic | 
	1803, 1830 | 
	Platinum pyrometer | 
	| Dart, Raymond | 
	1925 | 
	Tuang child | 
	| Dalgarno, George | 
	1647 - 1678 | 
	Philosophical language: Ars signorum | 
	| Darwin, Charles | 
	1859 | 
	Origin of species | 
	| Davaine, Casimir | 
	1876 | 
	Bacillus anthracis | 
	| Davis, Marguerite | 
	1913 - 1930 | 
	Vitamin discoveries: A and B | 
	| Davy, Humphry | 
	1802 - 1879 | 
	Incandescent light | 
	| 1807 | 
	Potassium
	(atomic number 19) | 
	| 1807 | 
	Sodium
	(atomic number 11) | 
	| 1808 | 
	Calcium
	(atomic number 20) | 
	| 1808 | 
	Boron
	(atomic number 5) | 
	| 1808 | 
	Barium
	(atomic number 56) | 
	| 1808 | 
	Magnesium
	(atomic number 12) | 
	| 1808 | 
	Strontium
	(atomic number 38) | 
	| 1810 | 
	Chlorine
	(atomic number 17) | 
	| 1810 | 
	Fluorine
	(atomic number 9) | 
	| 1811 | 
	Iodine
	(atomic number 53) | 
	| 1821 | 
	Electric conductivity | 
	| 1823 | 
	Silicon
	(atomic number 14) | 
	| Debierne, André-Louis | 
	1899 - 1910 | 
	Radon
	(atomic number 86) | 
	| 1899, 1902 | 
	Actinium
	(atomic number 89) | 
	| Delafontaine, Marc | 
	1878 - 1879 | 
	Holmium
	(atomic number 67) | 
	| Delastelle, Felix | 
	118 BCE - 1953 | 
	Cipher: Four-square cipher | 
	| Delbrück, Max | 
	1943 | 
	Bacterial genes | 
	| Delisle, Joseph-Nicolas | 
	1732 | 
	Delisle scale | 
	| Demarçay, Eugène-Anatole | 
	1890 - 1901 | 
	Europium
	(atomic number 63) | 
	| Dement, William C. | 
	1953 | 
	Rapid-eye-movement sleep | 
	| Demin, A. G. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Desaga, Peter | 
	1855 | 
	Bunsen burner | 
	| Descartes, René | 
	1637 | 
	Cartesian coordinates | 
	| 984, 1602, 1621, 1637 | 
	Snell’s law | 
	| Deutsch, Martin | 
	1932 - 1951 | 
	Positronium | 
	| Deville, Henri Étienne Sainte-Claire | 
	1801 | 
	Niobium
	(atomic number 41) | 
	| Diesbach, Johann Jacob | 
	1706 | 
	Prussian blue | 
	| Diesel, Rudolf | 
	1893 | 
	Diesel engine | 
	| Diffie, Whitfield | 
	1976 - 1991 | 
	Public-key cryptography | 
	| Diophantus | 
	285 | 
	Diophantine equation | 
	| Dioscorides, Pedanius | 
	70 AD | 
	Traditional medicine | 
	| Dirac, Paul | 
	1925, 1926 | 
	Pauli exclusion principle/Exchange interaction | 
	| 1928 | 
	Dirac equation
 | 
	| 1930 - 2014 | 
	Quasiparticles: Magnetic monopole | 
	| 1932 | 
	Antimatter | 
	| Djerassi, Carl | 
	1944 - 1960 | 
	The pill | 
	| Dobzhansky, Theodosius | 
	1918 | 
	Neo-Darwinism | 
	| Domagk, Gerhard | 
	1908, 1935 | 
	Sulfanilamide | 
	| Donets, E. D.
		
		 | 
	1958 | 
	Nobelium
	(atomic number 102) | 
	| Doppler, Christian | 
	1842 | 
	Doppler effect | 
	| Dorn, Friedrich Ernst | 
	1899 - 1910 | 
	Radon
	(atomic number 86) | 
	| Douady, Adrien | 
	1975 | 
	Fractal | 
	| Drebbel, Cornelis | 
	1590 - 1608 | 
	Microscope and telescope | 
	| 1620 | 
	Submarine | 
	| Druin, V. A. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Dubois, Eugène | 
	1891 | 
	Java man | 
	| Dumortier, Barthélemy Charles Joseph | 
	1839 | 
	Cell theory | 
	| Duncan, Robert | 
	1992 | 
	Magnetar | 
	| Dunwoody, Henry Harrison Chase | 
	1874, 1904 | 
	Crystal diode | 
	| Dyson, Freeman | 
	1948 | 
	Quantum electrodynamics | 
	| Easton, Roger L. | 
	1978 | 
	Global Positioning System | 
	| Eckert, J. Presper | 
	1946 | 
	ENIAC | 
	| Eddington, Arthur | 
	1920 | 
	Stellar evolution | 
	| Edison, Thomas | 
	1802 - 1879 | 
	Incandescent light | 
	| 1873, 1880 | 
	Thermionic emission | 
	| 1876 | 
	Industrial research laboratory | 
	| 1888 - 1926 | 
	Cinematography | 
	| Edson, Marcellus Gilmore | 
	1884 | 
	Peanut butter | 
	| Prehistoric Egyptians | 
	4400-3100 BCE | 
	Cosmetic pigment | 
	| Old Kingdom of Egypt | 
	2782 BCE | 
	Egyptian calendar | 
	| Ehrlich, Paul | 
	1910 | 
	Chemotherapy | 
	| Eichengrün, Arthur | 
	1897 | 
	Aspirin | 
	| Eijkman, Christiaan | 
	1913 - 1930 | 
	Vitamin discoveries: B | 
	| Einstein, Albert | 
	1900 | 
	Quanta | 
	| 1905 | 
	Special relativity | 
	| 1908 | 
	Brownian motion | 
	| 1915 | 
	General relativity | 
	| 1917 - 1960 | 
	Stimulated emission | 
	| 1922, 1926 | 
	Absorption refrigerator | 
	| 1925 | 
	Bose-Einstein condensate | 
	| Ekeberg, Anders Gustaf | 
	1802 | 
	Tantalum
	(atomic number 73) | 
	| Ekman, Vagn Walfrid | 
	1902 | 
	Ekman transport | 
	| Elhuyar, Juan José | 
	1781, 1783 | 
	Tungsten
	(atomic number 74) | 
	| Elhuyar, Fausto | 
	1781, 1783 | 
	Tungsten
	(atomic number 74) | 
	| Elsasser, Walter M. | 
	1946 | 
	Dynamo theory | 
	| Enders, John Franklin | 
	1955 | 
	Polio vaccine | 
	| Endo, Morinobu | 
	1952 - 1991 | 
	Fullerene | 
	| Eratosthenes | 
	240 BCE | 
	Geodesy | 
	| Ermakov, V. A.
		
		 | 
	1958 | 
	Nobelium
	(atomic number 102) | 
	| Eskola, Kari | 
	1969 | 
	Rutherfordium
	(atomic number 104) | 
	| 1970 | 
	Dubnium
	(atomic number 105) | 
	| Eskola, Pirkko | 
	1969 | 
	Rutherfordium
	(atomic number 104) | 
	| 1970 | 
	Dubnium
	(atomic number 105) | 
	| Esmark, Morten Thrane | 
	1829 | 
	Thorium
	(atomic number 90) | 
	| Euclid | 
	300 BCE | 
	Geometry | 
	| Euler, Leonhard | 
	1683 | 
	Euler’s number | 
	| 1736 | 
	Graph theory | 
	| 1736 - 1895 | 
	Topology | 
	| 1758 | 
	Euler characteristic | 
	| Evans, Herbert McLean | 
	1913 - 1930 | 
	Vitamin discoveries: E | 
	| Evans, Oliver | 
	1805 - 1876 | 
	Vapor-compression refrigeration | 
	| 1805 | 
	Oruktor Amphibolos | 
	| Evelyn, John | 
	1661 | 
	Air pollution | 
	| Eyde, Sam | 
	1784, 1903 | 
	Birkeland-Eyde process | 
	| Fahrenheit, Daniel Gabriel | 
	1724 | 
	Fahrenheit scale | 
	| Fajans, Kazimierz | 
	1913 | 
	Radioactive displacement law | 
	| Falcke, Heino | 
	2013 | 
	Blitzar | 
	| Faraday, Michael | 
	1820 | 
	Electromagnetism | 
	| 1823 | 
	Liquefaction of gases | 
	| 1825 | 
	Benzene | 
	| 1831 | 
	Faraday’s law of induction | 
	| 1831 | 
	Electric generator | 
	| 1831 | 
	Faraday wave | 
	| 1834 | 
	Laws of electrolysis | 
	| 1834 | 
	Ion | 
	| 1834 | 
	Faraday efficiency | 
	| 1836 | 
	Faraday cage | 
	| 1845 | 
	Diamagnetism | 
	| 1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| 1852 - 1854 | 
	Ideomotor phenomenon | 
	| Faure, Camille Alphonse | 
	1859, 1881 | 
	Lead-acid battery | 
	| Fefilov, B. V. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Ferguson, James | 
	1759, 1764 | 
	Pyrometer | 
	| de Fermat, Pierre | 
	1654 | 
	Probability theory | 
	| 1657 | 
	Diophantine equation: Pell’s equation | 
	| 1662 | 
	Fermat’s principle | 
	| Fermi, Enrico | 
	1942 | 
	Nuclear energy | 
	| Fessenden, Reginald | 
	1901 | 
	Heterodyne | 
	| 1902 | 
	Hot wire barretter | 
	| 1903 | 
	Electrolytic detector | 
	| 1906 | 
	AM broadcasting | 
	| 1912 | 
	Sonar | 
	| Feynman, Richard | 
	1948 | 
	Quantum electrodynamics | 
	| 1948 | 
	Feynman diagram | 
	| Fibonacci (Leonardo Pisano Bigollo) | 
	1202 | 
	Number system | 
	| Fischer, Herman Emil | 
	1894 | 
	Enzyme specificity | 
	| Fisher, Ronald | 
	1918 | 
	Neo-Darwinism | 
	| Fitch, Val | 
	1964 | 
	CP violation | 
	| FitzGerald, George Francis | 
	1889 | 
	Length contraction | 
	| Fleming, Alexander | 
	1928 | 
	Penicillin | 
	| Fleming, John Ambrose | 
	1904 | 
	Fleming valve | 
	| Flemming, Walther | 
	1878 | 
	Mitosis | 
	| Flyorov, Georgy | 
	1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| 1970 | 
	Dubnium
	(atomic number 105) | 
	| Folger, H. | 
	1984 | 
	Hassium
	(atomic number 108) | 
	| 1994 | 
	Darmstadtium
	(atomic number 110) | 
	| 1994 | 
	Roentgenium
	(atomic number 111) | 
	| 1996 | 
	Copernicium
	(atomic number 112) | 
	| de Forest, Lee | 
	1906 - 1912 | 
	Triode | 
	| Foucault, Léon | 
	1851 | 
	Foucault’s pendulum | 
	| Fox, George E. | 
	1999 | 
	Three-domain system | 
	| della Francesca, Piero | 
	1413 - 1420 | 
	Perspective | 
	| Frank, Ilya | 
	1934 | 
	Cherenkov radiation | 
	| Franklin, Benjamin | 
	1747 | 
	Electric charge | 
	| von Fraunhofer, Joseph | 
	1814 | 
	Spectral lines | 
	| Frenkel, Yakov | 
	1930 - 2014 | 
	Quasiparticles: Exciton | 
	| Fresnel, Augustin-Jean | 
	1678, 1816 | 
	Huygens—Fresnel principle | 
	| 1819 | 
	Wave optics | 
	| von Frisch, Karl | 
	1935 | 
	Instincts | 
	| 1945 | 
	Dancing bees | 
	| Frisch, Otto Robert | 
	1942 | 
	Nuclear energy | 
	| Freud, Sigmund | 
	1895 | 
	Libido | 
	| Gabor, Dennis | 
	1947 | 
	Holography | 
	| Gadolin, Johan | 
	1794 - 1843 | 
	Yttrium
	(atomic number 39) | 
	| Gahn, Johan Gottlieb | 
	1770 - 1774 | 
	Manganese
	(atomic number 25) | 
	| 1817 | 
	Selenium
	(atomic number 34) | 
	| Galambos, Robert | 
	1940 | 
	Bat echolocation | 
	| Galen | 
	180 | 
	Medical research | 
	| Galilei, Galileo | 
	1610 | 
	Observational astronomy | 
	| 1638 | 
	Kinematics | 
	| Galilei, Vincenzo | 
	1637 | 
	Mersenne’s laws | 
	| Gall, Joseph G. | 
	1971 - 1977 | 
	Telomere | 
	| Galle, Johann Gottfried | 
	1846 | 
	Discovery of Neptune | 
	| Galton, Francis | 
	1889 | 
	Measuring individuals | 
	| Galvani, Luigi | 
	1791, 1820 | 
	Galvanometer | 
	| Garrod, Archibald | 
	1909 | 
	Inborn errors of metabolism | 
	| Gascoigne, William | 
	1638 | 
	Micrometer | 
	| Gauss, Carl Friedrich | 
	1801 | 
	Discovery of an asteroid | 
	| 1833 | 
	Electrical telegraph | 
	| Gavrilov, K. A. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Gay-Lussac, Joseph Louis | 
	1808 | 
	Boron
	(atomic number 5) | 
	| 1811 | 
	Iodine
	(atomic number 53) | 
	| 1823 | 
	Silicon
	(atomic number 14) | 
	| Geiger, Hans | 
	1935 | 
	Geiger counter | 
	| Geißler, Heinrich | 
	1857 | 
	Geissler tube | 
	| Gellibrand, Henry | 
	1635 | 
	Magnetic declination | 
	| Gell-Mann, Murray | 
	1964 | 
	Quark | 
	| Gelmo, Paul | 
	1908, 1935 | 
	Sulfanilamide | 
	| Gessner, Conrad | 
	1565 | 
	Fossils | 
	| Getting, Ivan A. | 
	1978 | 
	Global Positioning System | 
	| Geoffroy, Claude François | 
	1753 | 
	Bismuth
	(atomic number 83) | 
	| Giardina, G. | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| Ghiorso, Albert | 
	1944 | 
	Curium
	(atomic number 96) | 
	| 1944 | 
	Americium
	(atomic number 95) | 
	| 1949 | 
	Berkelium
	(atomic number 97) | 
	| 1950 | 
	Californium
	(atomic number 98) | 
	| 1952 | 
	Einsteinium
	(atomic number 99) | 
	| 1952 | 
	Fermium
	(atomic number 100) | 
	| 1952 | 
	Mendelevium
	(atomic number 101) | 
	| 1958 | 
	Nobelium
	(atomic number 102) | 
	| 1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| 1969 | 
	Rutherfordium
	(atomic number 104) | 
	| 1970 | 
	Dubnium
	(atomic number 105) | 
	| 1974 | 
	Seaborgium
	(atomic number 106) | 
	| Gibbs, Josiah Willard | 
	1873 | 
	Gibbs free energy | 
	| 1876 | 
	Chemical potential | 
	| Gilbert, William | 
	1600 | 
	Magnetism | 
	| Giesel, Friedrich Oskar | 
	1899, 1902 | 
	Actinium
	(atomic number 89) | 
	| Gikal, Boris N. | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| 2000 | 
	Livermorium
	(atomic number 116) | 
	| Glendenin, Lawrence E. | 
	1945 | 
	Promethium
	(atomic number 61) | 
	| Gmelin, Leopold | 
	1825, 1826 | 
	Bromine
	(atomic number 35) | 
	| Goldschmidt, Victor | 
	1937 | 
	Goldschmidt classification | 
	| Gödel, Kurt | 
	1931 | 
	Incompleteness theorems | 
	| Göhring, Oswald Helmuth | 
	1913 - 1918 | 
	Protactinium
	(atomic number 91) | 
	| Golgi, Camillo | 
	1889 | 
	Nervous system | 
	| Goodall, Jane | 
	1960 - 1975 | 
	Chimpanzees and humans | 
	| Gordon, James P. | 
	1917 - 1960 | 
	Stimulated emission | 
	| Gorrie, John | 
	1805 - 1876 | 
	Vapor-compression refrigeration | 
	| Gorshkov, Vladimir A. | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| Gram, Hans Christian | 
	1884 | 
	Gram staining | 
	| Gregor, William | 
	1791 - 1910 | 
	Titanium
	(atomic number 22) | 
	| Gregory, James | 
	1668, 1669 | 
	Fundamental theorem of calculus | 
	| Greider, Carol W. | 
	1971 - 1977 | 
	Telomere | 
	| Grew, Nehemiah | 
	1670, 1886 | 
	Palynology | 
	| 1684 | 
	Fingerprint | 
	| Griffin, Donald | 
	1940 | 
	Bat echolocation | 
	| Griffith, Frederick | 
	1928 | 
	Transformation | 
	| Grimm, Rudolf | 
	2003 | 
	Fermionic condensate | 
	| Guérin, Camille | 
	1921 | 
	Tuberculosis vaccine | 
	| Gulbekian, Georgy G. | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| 2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| Gutenberg, Johannes  | 
	1455 | 
	Movable-type printing | 
	| Guthrie, Frederick | 
	1873, 1880 | 
	Thermionic emission | 
	| Guyton de Morveau, Louis-Bernard | 
	1803, 1830 | 
	Platinum pyrometer | 
	| Haber, Fritz | 
	1909 | 
	Synthesis of ammonia | 
	| Hadley, George | 
	1735 | 
	Trade winds | 
	| Hahn, Otto | 
	1913 - 1918 | 
	Protactinium
	(atomic number 91) | 
	| 1942 | 
	Nuclear fission | 
	| Haldane, J. B. S. | 
	1918 | 
	Neo-Darwinism | 
	| Hall, James | 
	1797 | 
	Catastrophist geology | 
	| Halley, Edmond | 
	1705 | 
	Halley’s comet | 
	| Hamilton, W. D. | 
	1964 | 
	Altruism | 
	| Hankin, Ernest Hanbury | 
	1896 | 
	Preventing cholera | 
	| Harriot, Thomas | 
	984, 1602, 1621, 1637 | 
	Snell’s law | 
	| Harris, James Andrew | 
	1969 | 
	Rutherfordium
	(atomic number 104) | 
	| 1970 | 
	Dubnium
	(atomic number 105) | 
	| Harrison, James | 
	1805 - 1876 | 
	Vapor-compression refrigeration | 
	| Harvey, Bernard G. | 
	1955 | 
	Mendelevium
	(atomic number 101) | 
	| Harvey, William | 
	1628 | 
	Circulation of the blood | 
	| Hatchett, Charles | 
	1801 | 
	Niobium
	(atomic number 41) | 
	| Hauksbee, Francis | 
	1705, 1894 | 
	Gas-discharge lamp | 
	| Hausdorff, Felix | 
	1918, 1975 | 
	Fractal dimension | 
	| de Hautefeuille, Jean | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Hawking, Stephen | 
	1974 | 
	Hawking radiation | 
	| Hayflick, Leonard | 
	1961 | 
	Hayflick limit | 
	| Haygarth, John | 
	1799 | 
	Placebo effect | 
	| Heath, James R. | 
	1952 - 1991 | 
	Fullerene | 
	| Heaviside, Oliver | 
	1899 | 
	Loading coil | 
	| 1934 | 
	Cherenkov radiation | 
	| Heisenberg, Werner | 
	1925 | 
	Wave-particle duality | 
	| 1925, 1926 | 
	Pauli exclusion principle/Exchange interaction | 
	| 1927 | 
	Uncertainty principle | 
	| Hellman, Martin | 
	1976 - 1991 | 
	Public-key cryptography | 
	| Hellriegel, Hermann | 
	1888 | 
	Nitrogen fixation | 
	| d’Herelle, Félix | 
	1915, 1917 | 
	Bacteriophage | 
	| Hermann, Karl Samuel Leberecht | 
	1817 | 
	Cadmium
	(atomic number 48) | 
	| Herschel, John | 
	1842 | 
	Cyanotype | 
	| Herschel, William | 
	1781 | 
	Discovery of Uranus | 
	| Hero of Alexandria (Heron) | 
	70 | 
	Windmill | 
	| Hertz, Heinrich | 
	1896 | 
	Radio | 
	| 1904 | 
	Telemobiloscope | 
	| Hertzsprung, Ejnar | 
	1920 | 
	Stellar evolution | 
	| Hess, Victor Francis | 
	1911 | 
	Cosmic rays | 
	| Heßberger, Fritz Peter | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| 1982 | 
	Meitnerium
	(atomic number 109) | 
	| 1984 | 
	Hassium
	(atomic number 108) | 
	| 1994 | 
	Darmstadtium
	(atomic number 110) | 
	| 1994 | 
	Roentgenium
	(atomic number 111) | 
	| 1996 | 
	Copernicium
	(atomic number 112) | 
	| von Hevesy, Georg | 
	1913 - 1918 | 
	Protactinium
	(atomic number 91) | 
	| 1942 | 
	Nuclear fission | 
	| Hill, Lester S. | 
	118 BCE - 1953 | 
	Cipher: Hill cipher | 
	| Hillel II | 
	359 | 
	Hebrew calendar | 
	| Hindley, Henry | 
	1739 | 
	Dividing engine | 
	| Hingmann, R. | 
	1984 | 
	Hassium
	(atomic number 108) | 
	| Hipparchus | 
	134 BCE | 
	Astronomy | 
	| Hippocrates | 
	400 BCE | 
	Medicine | 
	| Hiriyuki, Koura | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Hisinger, Wilhelm | 
	1803 | 
	Cerium
	(atomic number 58) | 
	| Hittorf, Johann Wilhelm | 
	1869 | 
	Cathode ray | 
	| Hjelm, Peter Jacob | 
	1778, 1781 | 
	Molybdenum
	(atomic number 42) | 
	| Hodgkin, Alan Lloyd | 
	1952 | 
	Nerve impulses | 
	| Hodgkin, Dorothy | 
	1945 | 
	Structure of penicillin | 
	| Hoffmann, Felix | 
	1897 | 
	Aspirin | 
	| Hofmann, Sigurd | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| 1982 | 
	Meitnerium
	(atomic number 109) | 
	| 1984 | 
	Hassium
	(atomic number 108) | 
	| 1994 | 
	Darmstadtium
	(atomic number 110) | 
	| 1994 | 
	Roentgenium
	(atomic number 111) | 
	| 1996 | 
	Copernicium
	(atomic number 112) | 
	| Hogg, John | 
	1860 | 
	Protist | 
	| Holberton, Betty | 
	1946 | 
	ENIAC | 
	| Holborn, Ludwig | 
	1901 | 
	Disappearing-filament pyrometer | 
	| Hope, Thomas Charles | 
	1790, 1808 | 
	Strontium
	(atomic number 38) | 
	| Hooke, Robert | 
	1665 | 
	Cell | 
	| 1673 | 
	Microorganisms | 
	| 1682 | 
	Memory | 
	| Hopkins, Frederick Gowland | 
	1906 | 
	Vitamins | 
	| Horrocks, Jeremiah | 
	1639 | 
	Transit of Venus | 
	| Huangdi | 
	2637 BCE | 
	Chinese calendar | 
	| Hubble, Edwin | 
	1918 | 
	The universe | 
	| 1929 | 
	Expanding universe | 
	| Hughes, Vernon W. | 
	1960 | 
	Muonium | 
	| Hulet, E. Kenneth | 
	1974 | 
	Seaborgium
	(atomic number 106) | 
	| Hülsmeyer, Christian | 
	1904 | 
	Telemobiloscope | 
	| von Humboldt, Alexander | 
	1799 | 
	Humboldt’s voyage | 
	| Hunter, John | 
	1796 | 
	Comparative anatomy | 
	| Hunter, Matthew | 
	1791 - 1910 | 
	Titanium
	(atomic number 22) | 
	| Hutton, James | 
	1785 | 
	Earth cycles | 
	| 1797 | 
	Catastrophist geology | 
	| Huxley, Andrew | 
	1952 | 
	Nerve impulses | 
	| Huxley, Thomas Henry | 
	1846 - 1868 | 
	Protoplasm | 
	| 1860 | 
	Archaeopteryx | 
	| Huygens, Christiaan | 
	1656 | 
	Rings of Saturn | 
	| 1657 | 
	Pendulum clock | 
	| 1678 - 1876 | 
	Internal combustion engine | 
	| 1678, 1816 | 
	Huygens—Fresnel principle | 
	| 1817 | 
	Kater’s pendulum | 
	| Hyder Ali | 
	1780 | 
	Mysorean rockets | 
	| Ideguchi, Eiji | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Iijima, Sumio | 
	1952 - 1991 | 
	Fullerene | 
	| Ikeda, Kikunae | 
	1908 | 
	Umami | 
	| Iliev, S. | 
	2000 | 
	Livermorium
(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| Imhotep | 
	2648 BCE | 
	Step pyramid | 
	| Ingersoll, Leonard R. | 
	1914 | 
	Glossmeter | 
	| Isaacson, Richard A. | 
	1967 | 
	LIGO | 
	| Itkis, Michael Grigorievich | 
	1999-2007 | 
	Flerovium
	(atomic number 114) | 
	| 2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Ivanov, O. V. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| James, Charles | 
	1907 | 
	Lutetium
	(atomic number 71) | 
	| James, Ralph A. | 
	1944 | 
	Curium
	(atomic number 96) | 
	| 1944 | 
	Americium
	(atomic number 95) | 
	| Janssen, Pierre | 
	1868 - 1895 | 
	Helium
	(atomic number 2) | 
	| Janssen, Zacharias | 
	1590 - 1608 | 
	Microscope and telescope | 
	| Jansky, Karl Guthe | 
	1933 | 
	Radio astronomy | 
	| Jenner, Edward | 
	1796 | 
	Vaccination | 
	| Jin, Deborah | 
	2003 | 
	Fermionic condensate | 
	| Joliot-Curie, Frédéric | 
	1935 | 
	Induced radioactivity | 
	| Joliot-Curie, Irène | 
	1935 | 
	Induced radioactivity | 
	| Joule, James Prescott | 
	1842 | 
	Magnetostriction | 
	| 1842 | 
	Conservation of energy | 
	| 1847 | 
	Laws of thermodynamics
 | 
	| 1852 | 
	Joule-Thomson effect | 
	| Kabachenko, Petrovich Kabachenko | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| Kaji, Daiya | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Kanner, Leo | 
	1938, 1943 | 
	Autism | 
	| Kapitsa, Pyotr | 
	1937 | 
	Superfluidity | 
	| Kater, Henry | 
	1817 | 
	Kater’s pendulum | 
	| Katori, Kenji | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Keeling, Charles David | 
	1961 | 
	Keeling curve | 
	| Kekulé, August | 
	1865 | 
	Benzene ring | 
	| Keller, J. | 
	1984 | 
	Hassium
	(atomic number 108) | 
	| Kelvin, William Thomson Lord | 
	1848 | 
	Kelvin scale | 
	| 1879 | 
	Kelvin wave | 
	| 1852 | 
	Joule-Thomson effect | 
	| 1888 | 
	Ampere balance | 
	| Kendrew, John | 
	1958 - 1959 | 
	Protein crystallography | 
	| Kennedy, Joseph W. | 
	1940 | 
	Plutonium
	(atomic number 94) | 
	| Kepler, Johannes | 
	1609 | 
	Planetary orbits | 
	| Kerr, John | 
	1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| Ketterle, Wolfgang | 
	2003 | 
	Fermionic condensate | 
	| Kharitonov, Yu. P. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Khomskii, Daniel I. | 
	1930 - 2014 | 
	Quasiparticles: Orbiton | 
	| Kidston, Robert | 
	1670, 1886 | 
	Palynology | 
	| Kikunaga, Hidetoshi | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Kirchhoff, Gustav | 
	1859 | 
	Analytical spectroscopy | 
	| 1860, 1882 | 
	Caesium
	(atomic number 55) | 
	| 1861 | 
	Rubidium
	(atomic number 37) | 
	| Kitaibel, Pál | 
	1782 | 
	Tellurium
	(atomic number 52) | 
	| Kitasato, Shibasaburō | 
	1890 | 
	Antitoxins | 
	| Klaproth, Martin Heinrich | 
	1782 | 
	Tellurium
	(atomic number 52) | 
	| 1789, 1824 | 
	Zirconium
	(atomic number 40) | 
	| 1789, 1841 | 
	Uranium
	(atomic number 92) | 
	| 1791 - 1910 | 
	Titanium
	(atomic number 22) | 
	| 1803 | 
	Cerium
	(atomic number 58) | 
	| Klein, Oskar | 
	1971 | 
	Plasma cosmology | 
	| von Kleist, Ewald Georg | 
	1745 - 1746 | 
	Leyden jar | 
	| Kleitman, Nathaniel | 
	1953 | 
	Rapid-eye-movement sleep | 
	| Knudsen, Martin | 
	1879 | 
	Thermal transpiration | 
	| von Kobell, Wolfgang Franz | 
	1801 | 
	Niobium
	(atomic number 41) | 
	| Koch, Robert | 
	1854, 1884 | 
	Vibrio cholerae | 
	| 1876 | 
	Bacillus anthracis
 | 
	| 1882 | 
	Mycobacterium tuberculosis | 
	| Kolesov, I. V. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Kouveliotou, Chryssa | 
	1992 | 
	Magnetar | 
	| Krebs, Hans Adolf | 
	1937 | 
	Citric-acid cycle | 
	| Kroto, Harold | 
	1952 - 1991 | 
	Fullerene | 
	| Kudo, Hisaaki | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Kurlbaum, Ferdinand | 
	1901 | 
	Disappearing-filament pyrometer | 
	| Kwolek, Stephanie | 
	1964 | 
	Kevlar | 
	| Lamarck, Jean-Baptiste | 
	1809 | 
	Acquired characteristics | 
	| Lamarr, Hedy | 
	1942 | 
	Frequency-hopping | 
	| Lambert, Johann Heinrich | 
	1768 | 
	Pi | 
	| Lamy, Claude-Auguste | 
	1861 - 1862 | 
	Thallium
	(atomic number 81) | 
	| Landau, Len | 
	1930 - 2014 | 
	Quasiparticles: Polaron, roton & maxon | 
	| Landsteiner, Karl | 
	1901 | 
	Blood groups | 
	| Langen, Eugen | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Langlet, Nils Abraham | 
	1868 - 1895 | 
	Helium
	(atomic number 2) | 
	| Langley, Samuel Pierpont | 
	1878 | 
	Bolometer | 
	| Langmuir, Irving | 
	1906 - 1912 | 
	Triode | 
	| 1924 - 1928 | 
	Plasma | 
	| 1927 | 
	Langmuir circulation | 
	| 1928 - 1929 | 
	Plasma oscillation | 
	| Langton, Christopher | 
	1986 | 
	Artificial life | 
	| Laplace, Pierre-Simon | 
	1796 | 
	Origin of our solar system | 
	| Larsh, Almon | 
	1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| Lartet, Édouard | 
	1834 | 
	Cro-Magnons | 
	| Lartet, Louis | 
	1834 | 
	Cro-Magnons | 
	| Latimer, Robert M. | 
	1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| Lattes, César | 
	1934, 1947 | 
	Meson | 
	| von Laue, Max | 
	1911 - 1920 | 
	Sagnac effect | 
	| Laughlin, Robert B. | 
	1930 - 2014 | 
	Quasiparticles: Fractional quantum Hall effect | 
	| Laveran, Charles Louis Alphonse | 
	1897 | 
	Malarial parasite | 
	| Lavoisier, Antoine | 
	1774 | 
	Combustion
	(atomic number 8) | 
	| 1774 | 
	Conservation of mass | 
	| 1787 | 
	Chemical nomenclature | 
	| 1823 | 
	Silicon
	(atomic number 14) | 
	| Lavrentiev, Anton Yurievich | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| Leakey, Louis | 
	1959 | 
	Paranthropus boisei | 
	| Leakey, Mary | 
	1959 | 
	Paranthropus boisei | 
	| Leavitt, Henrietta Swan | 
	1918 | 
	The universe | 
	| Lee, Tsung-Dao | 
	1956 | 
	Parity violation | 
	| van Leeuwenhock, Antonie | 
	1673 | 
	Microorganisms | 
	| 1719 | 
	Cell | 
	| Lehmann, Inge | 
	1936 | 
	Inner core | 
	| Leibniz, Gottfried Wilhelm | 
	1647 - 1678 | 
	Philosophical language: Lingua generalis | 
	| 1679 | 
	Binary number | 
	| 1684 | 
	Calculus | 
	| 2400 BCE - 1820 CE | 
	Computing devices: Stepped Reckoner | 
	| Leidenfrost, Johann Gottlob | 
	1756 | 
	Leidenfrost effect | 
	| Leino, Matti | 
	1984 | 
	Hassium
	(atomic number 108) | 
	| Lemaître, Georges | 
	1929 | 
	Expanding universe | 
	| Lenoir, Étienne | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Le Prince, Louis | 
	1888 - 1927 | 
	Cinematography | 
	| Leslie, John | 
	1818 | 
	Aethrioscope | 
	| Levi-Montalcini, Rita | 
	1952 | 
	Nerve growth | 
	| Lewis, Gilbert N. | 
	1916 | 
	Chemical bond | 
	| Lhuilier, Antoine-Jean | 
	1736 - 1895 | 
	Topology | 
	| Liang Lingzan | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Libby, Willard | 
	1947 | 
	Radiocarbon dating | 
	| von Linde, Carl | 
	1805 - 1876 | 
	Vapor-compression refrigeration | 
	| von Lindemann, Ferdinand | 
	1768 | 
	Pi | 
	| Linnaeus, Carl | 
	1735 | 
	Naming species | 
	| Lippershey, Hans | 
	1590 - 1608 | 
	Microscope and telescope | 
	| Lippmann, Gabriel | 
	1880, 1881 | 
	Piezoelectricity | 
	| Lister, Joseph | 
	1865 | 
	Antiseptic surgery | 
	| Listing, Johann Benedict | 
	1736 - 1895 | 
	Topology | 
	| Lobachevsky, Nicolai | 
	1829 | 
	Non-Euclidean geometry | 
	| Lobanov, Yu. V. | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| 2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Lockyer, Norman | 
	1868 - 1895 | 
	Helium
	(atomic number 2) | 
	| Lodwick, Francis | 
	1647 - 1678 | 
	Philosophical language: Common Writing | 
	| Loewi, Otto | 
	1914 | 
	Neurotransmitters | 
	| Long, Crawford | 
	1842 - 1846 | 
	Anesthesia | 
	| Lorentz, Hendrik | 
	1904 | 
	Lorentz transformations | 
	| Lorenz, Konrad | 
	1935 | 
	Instincts | 
	| Lo Surdo, Antonino | 
	1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| Lougheed, Ronald W. | 
	1974 | 
	Seaborgium
	(atomic number 106) | 
	| Lovelace, Ada | 
	1822 | 
	The first computer program | 
	| Löwig, Carl Jacob | 
	1825, 1826 | 
	Bromine
	(atomic number 35) | 
	| Lu Ban | 
	5th century BCE | 
	Kite | 
	| Lukin, Mikhail | 
	2017 | 
	Time crystal | 
	| Lumière, Auguste and Louis | 
	1888 - 1927 | 
	Cinematography | 
	| Lukyanovich, V. M. | 
	1952 - 1991 | 
	Fullerene | 
	| Luria, Salvador | 
	1943 | 
	Bacterial genes | 
	| Luttinger, Joaquin Mazdak | 
	1930 - 2014 | 
	Quasiparticles: Holon and spinon | 
	| Lyell, Charles | 
	1830 | 
	Principles of geology | 
	| MacKenzie, Kenneth Ross | 
	1940 | 
	Astatine
	(atomic number 85) | 
	| MacLeod, Colin Munro | 
	1944 | 
	Molecular genetics | 
	| Maelzel, Johann Nepomuk | 
	1814 - 1815 | 
	Metronome | 
	| Magnus, Heinrich Gustav | 
	1672, 1742, 1852 | 
	Magnus effect | 
	| Maiman, Theodore Harold | 
	1917 - 1960 | 
	Stimulated emission | 
	| Maimonides | 
	359 | 
	Hebrew calendar | 
	| Majorana, Ettore | 
	1930 - 2014 | 
	Quasiparticles: Majorana fermion | 
	| 1935 | 
	Majorana fermion | 
	| Malthus, Thomas Robert | 
	1798 | 
	Population pressure | 
	| Malyshev, Oleg Nikolaevich | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| Mandelbrot, Benoit | 
	1918, 1975 | 
	Fractal dimension | 
	| 1975 | 
	Fractal | 
	| Manson, Patrick | 
	1897 | 
	Malarial parasite | 
	| Marangoni, Carlo | 
	1855, 1865 | 
	Marangoni effect | 
	| Marconi, Guglielmo | 
	1896 | 
	Radio | 
   | 1896, 1902 | 
   Magnetic detector | 
	| Marggraf, Andreas Sigismund | 
	1764 | 
	Fluorine
	(atomic number 9) | 
	| de Marignac, Jean Charles Galissard | 
	1801 | 
	Niobium
	(atomic number 41) | 
	| 1878, 1907 | 
	Ytterbium
	(atomic number 70) | 
	| 1880 | 
	Gadolinium
	(atomic number 64) | 
	| Marinsky, Jacob A. | 
	1945 | 
	Promethium
	(atomic number 61) | 
	| Marker, Russell Earl | 
	1944 - 1960 | 
	The pill | 
	| Martel, Édouard-Alfred | 
	1895 | 
	Speleology | 
	| Marten, Benjamin | 
	1882 | 
	Mycobacterium tuberculosis | 
	| Matteucci, Felice | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Matuyama, Motonori | 
	1929 | 
	Geomagnetic reversals | 
	| Maudslay, Henry | 
	1638 | 
	Micrometer | 
	| Mauchly, John | 
	1946 | 
	ENIAC | 
	| Maxwell, James Clerk | 
	1656 | 
	Rings of Saturn | 
	| 1864 | 
	Maxwell’s equations | 
	| Mayan | 
	1050 | 
	Maya calendar | 
	| von Mayer, Julius | 
	1842 | 
	Conservation of energy | 
	| McCarty, Maclyn | 
	1944 | 
	Molecular genetics | 
	| McClintock, Barbara | 
	1951 | 
	Jumping genes | 
	| McCormick, Katharine | 
	1944 - 1960 | 
	The pill | 
	| McCulloch, Warren Sturgis | 
	1943 | 
	Neural networks | 
	| McCollum, Elmer | 
	1913 - 1930 | 
	Vitamin discoveries: A, B, and D | 
	| McMillan, Edwin | 
	1940 | 
	Neptunium
	(atomic number 93) | 
	| 1940 | 
	Plutonium
	(atomic number 94) | 
	| Medawar, Peter | 
	1949 | 
	Immune tolerance | 
	| Meissner, Walther | 
	1933 | 
	Meissner effect | 
	| Meitner, Lise | 
	1913 - 1918 | 
	Protactinium
	(atomic number 91) | 
	| 1942 | 
	Nuclear fission | 
	| Mellanby, Edward | 
	1913 - 1930 | 
	Vitamin discoveries: D | 
	| Meltzer, Marlyn | 
	1946 | 
	ENIAC | 
	| Mendel, Gregor Johann | 
	1865 | 
	Laws of inheritance | 
	| Mendel, Lafayette | 
	1913 - 1930 | 
	Vitamin discoveries: A and B | 
	| Mendeleev, Dmitri | 
	1869 | 
	Periodic table | 
	| 1875 | 
	Gallium
	(atomic number 31) | 
	| 1879 | 
	Scandium
	(atomic number 21) | 
	| 1886 | 
	Germanium
	(atomic number 32) | 
	| Mercator, Gerardus | 
	1569 | 
	Mercator projection | 
	| Merkle, Ralph | 
	1976 - 1991 | 
	Public-key cryptography | 
	| Mersenne, Marin | 
	1637 | 
	Mersenne’s laws | 
	| Metchnikoff, Élie | 
	1882 | 
	Cellular immunity | 
	| Metius, Jacob | 
	1590 - 1608 | 
	Microscope and telescope | 
	| Mezentsev, A. N. | 
	2000 | 
	Livermorium
(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Michell, John | 
	1784 | 
	Black hole | 
	| 1798 | 
	‘Weighing’ the world | 
	| Michelson, Albert A. | 
	1887 | 
	Michelson-Morley experiment | 
	| Mikheev, V. L. | 
	1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| Milanković, Milutin | 
	1914 | 
	Climate cycles | 
	| Miller, Frank | 
	118 BCE - 1953 | 
	Cipher: One-time pad | 
	| Miller, Stanley | 
	1953 | 
	Abiogenesis | 
	| Minard, Charles Joseph | 
	1644 - 1869 | 
	Infographics | 
	| Minot, George Richards | 
	1913 - 1930 | 
	Vitamin discoveries: B12 | 
	| Miramontes, Luis E. | 
	1944 - 1960 | 
	The pill | 
	| Misener, Don | 
	1937 | 
	Superfluidity | 
	| Möbius, August Ferdinand | 
	1736 - 1895 | 
	Topology | 
	| von Mohl, Hugo | 
	1839 | 
	Cell theory | 
	| 1846 | 
	Protoplasm | 
	| Mohorovičić, Andrija | 
	1906 | 
	Earth interior | 
	| Mohorovičić, Stjepan | 
	1932 - 1951 | 
	Positronium | 
	| Mohs, Friedrich | 
	1812 | 
	Mohs scale | 
	| Moissan, Henri | 
	1886 | 
	Fluorine
	(atomic number 9) | 
	| Monroe, Christopher | 
	2017 | 
	Time crystal | 
	| Montgolfier, Joseph-Michel | 
	1772, 1796 | 
	Hydraulic ram | 
	| Morgan, Leon O. | 
	1944 | 
	Americium
	(atomic number 95) | 
	| Morgan, Thomas Hunt | 
	1910 | 
	Genes | 
	| Morgenstern, Oskar | 
	1944 | 
	Game theory | 
	| Morimoto, Kouji | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Morita, Kōsuke | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| 2012 | 
	Nihonium
	(atomic number 113) | 
	| Morland, Samuel | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Morley, Edward W. | 
	1887 | 
	Michelson-Morley experiment | 
	| Morse, Harmon Northrup | 
	1901 | 
	Disappearing-filament pyrometer | 
	| Morse, Samuel | 
	1816 | 
	Electrical telegraph | 
	| Morton, William T. G. | 
	1842 - 1846 | 
	Anesthesia | 
	| Mosander, Carl Gustaf | 
	1794 - 1843 | 
	Yttrium
	(atomic number 39) | 
	| 1839 | 
	Cerium
	(atomic number 58) | 
	| 1839 | 
	Lanthanum
	(atomic number 57) | 
	| 1843 | 
	Terbium
	(atomic number 65) | 
	| 1843 | 
	Erbium
	(atomic number 68) | 
	| Moseley, Henry | 
	1913 | 
	Atomic battery | 
	| Mössbauer, Rudolf | 
	1958 | 
	Mössbauer effect | 
	| Mouton, Henri | 
	1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| Mozi | 
	5th century BCE | 
	Kite | 
	| Mpemba, Erasto Batholomeo | 
	1963 | 
	Mpemba effect | 
	| Müller, Fritz | 
	1878 | 
	Müllerian mimicry | 
	| Müller, Gerhard Friedrich | 
	1743 | 
	Ethnography | 
	| Muller, Hermann Joseph | 
	1910 | 
	Genes | 
	| Müller, Paul Hermann | 
	1939 | 
	DDT | 
	| Müller, Walther | 
	1935 | 
	Geiger counter | 
	| Munters, Carl | 
	1922, 1926 | 
	Absorption refrigerator | 
	| Münzenberg, Gottfried | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| 1982 | 
	Meitnerium
	(atomic number 109) | 
	| 1984 | 
	Hassium
	(atomic number 108) | 
	| 1994 | 
	Darmstadtium
	(atomic number 110) | 
	| 1994 | 
	Roentgenium
	(atomic number 111) | 
	| Murphy, George M. | 
	1931 | 
	Deuterium | 
	| Murphy, William | 
	1913 - 1930 | 
	Vitamin discoveries | 
	| van Musschenbroek, Pieter | 
	1745 - 1746 | 
	Leyden jar | 
	| Nagarjuna | 
	1669 | 
	Zinc
	(atomic number 30) | 
	| Nansen, Fridtjof | 
	1894 | 
	Nansen bottle | 
	| 1902 | 
	Ekman transport | 
	| Napier, John | 
	1614 | 
	Logarithms | 
	| 2400 BCE - 1820 CE | 
	Computing devices | 
	| 1617 | 
	Binary number | 
	| Nebel, Fritz | 
	118 BCE - 1953 | 
	Cipher: ADFGVX cipher | 
	| Neddermeyer, Seth | 
	1936 | 
	Muon | 
	| von Neumann, John | 
	1944 | 
	Game theory | 
	| 1946 | 
	Computer | 
	| 1946 | 
	ENIAC | 
	| 1948 | 
	Cellular automaton | 
	| Newton, Isaac | 
	1666 | 
	Theory of color | 
	| 1671 | 
	Calculus | 
	| 1672, 1742, 1852 | 
	Magnus effect | 
	| 1687 | 
	Principia Mathematica | 
	| 1701 | 
	Newton scale | 
	| Nicol, William | 
	1828 | 
	Nicol prism | 
	| van Niel, C. B. | 
	1925, 1962 | 
	Prokaryote and eukaryote | 
	| Niépce, Claude | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Niépce, Nicéphore | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Nightingale, Florence | 
	1644 - 1869 | 
	Infographics | 
	| Nilson, Lars Fredrik | 
	1879 | 
	Scandium
	(atomic number 21) | 
	| Ninov, Victor | 
	1994 | 
	Darmstadtium
	(atomic number 110) | 
	| 1994 | 
	Roentgenium
	(atomic number 111) | 
	| 1996 | 
	Copernicium
	(atomic number 112) | 
	| Niskin, Shale | 
	1894 | 
	Nansen bottle | 
	| Nitschke, Joachim Michael | 
	1974 | 
	Seaborgium
	(atomic number 106) | 
	| Nobel, Alfred | 
	1867 | 
	Dynamite | 
	| Noddack, Walter | 
	1908, 1925 | 
	Rhenium
	(atomic number 75) | 
	| Noether, Emmy | 
	1918 | 
	Noether’s theorem | 
	| Nunes, Pedro | 
	1542 | 
	Nonius | 
	| Nurmia, Matti | 
	1969 | 
	Rutherfordium
	(atomic number 104) | 
	| 1970 | 
	Dubnium
	(atomic number 105) | 
	| 1974 | 
	Seaborgium
	(atomic number 106) | 
	| Occhialini, Giuseppe | 
	1934, 1947 | 
	Meson | 
	| Ochsenfeld, Robert | 
	1933 | 
	Meissner effect | 
	| Odhner, Willgodt Theophil | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Oganessian, Yuri | 
	1999-2007 | 
	Flerovium
	(atomic number 114) | 
	| 2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Ogawa, Masataka | 
	1908, 1925 | 
	Rhenium
	(atomic number 75) | 
	| Ohm, Georg | 
	1827 | 
	Ohm’s law | 
	| Ohnishi, Testuya | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Oldham, Richard Dixon | 
	1906 | 
	Earth interior | 
	| Olovnikov, Alexey | 
	1971 - 1977 | 
	Telomere | 
	| Onnes, Heike Kamerlingh | 
	1911 | 
	Superconductivity | 
	| Onsager, Lars | 
	1930 - 2014 | 
	Quasiparticles: Quantum vortex | 
	| Oort, Jan | 
	1950 | 
	Oort cloud | 
	| Ørsted, Hans Christian | 
	1791, 1820 | 
	Galvanometer | 
	| 1820 | 
	Electromagnetism | 
	| 1821, 1834 | 
	Thermoelectric effect | 
	| 1825, 1827 | 
	Aluminium
	(atomic number 13) | 
	| Osborne, Denis G. | 
	1963 | 
	Mpemba effect | 
	| Osborne, Thomas Burr | 
	1913 - 1930 | 
	Vitamin discoveries: A and B | 
	| Otto, F. J. | 
	1846 | 
	Guncotton | 
	| Otto, Nikolaus | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Oughtred, William | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Owen, Richard | 
	1842 | 
	Dinosaur | 
	| 1860 | 
	Archaeopteryx | 
	| Owens, Robert Bowie | 
	1899 - 1910 | 
	Radon
	(atomic number 86) | 
	| Ozawa, Akira | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Pacini, Filippo | 
	1854, 1884 | 
	Vibrio cholerae | 
	| Palaeolithic people | 
	99,000-13,000 BCE | 
	Pigment | 
	| Palmieri, Luigi | 
	1868 - 1895 | 
	Helium
	(atomic number 2) | 
	| Pander, Heinz Christian | 
	1817 | 
	Germ layers | 
	| Papin, Denis | 
	1678 - 1876 | 
	Internal combustion engine | 
	| 1679 | 
	Pressure cooker, safety valve | 
	| Paracelsus | 
	1526 | 
	Bismuth
	(atomic number 83),
	Zinc
	(atomic number 30) | 
	| 1538 | 
	Toxicology | 
	| Parkes, Alexander | 
	1862 | 
	Celluloid | 
	| Parkinson, Bradford | 
	1978 | 
	Global Positioning System | 
	| Parson, Alfred Lauck | 
	1915 | 
	Parson magneton | 
	| Parsons, William | 
	1845 | 
	Spiral galaxies | 
	| Pascal, Blaise | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| 1643 | 
	Atmospheric pressure | 
	| 1654 | 
	Probability theory | 
	| Paschen, Friedrich | 
	1889 | 
	Paschen’s law | 
	| Pasteur, Louis | 
	1878 | 
	Germ theory | 
	| 1880 - 1881 | 
	Anthrax vaccine | 
	| 1881 | 
	Streptococcus pneumoniae | 
	| 1885 | 
	Rabies vaccine | 
	| Pauli, Wolfgang | 
	1925, 1926 | 
	Pauli exclusion principle/Exchange interaction | 
	| 1956 | 
	Neutrino | 
	| Pauling, Linus | 
	1949 | 
	Sickle-cell disease | 
	| Pavlov, Ivan | 
	1904 | 
	Conditioned reflexes | 
	| Peckham, George and Elizabeth | 
	1889 | 
	Aggressive mimicry | 
	| Peierls, Rudolf | 
	1942 | 
	Nuclear energy | 
	| Péligot, Eugène-Melchoir | 
	1789, 1841 | 
	Uranium
	(atomic number 92) | 
	| Peltier, Jean Charles Athanase | 
	1834 | 
	Peltier effect | 
	| Perey, Marguerite | 
	1939 | 
	Francium
	(atomic number 87) | 
	| Perkin, William Henry | 
	1856 | 
	Mauve | 
	| Perkins, Jacob | 
	1805 - 1876 | 
	Vapor-compression refrigeration | 
	| Perl, Martin Lewis | 
	1971 - 1977 | 
	Tau | 
	| Perrier, Carlo | 
	1937 | 
	Technetium
	(atomic number 43) | 
	| Perrin, Jean Baptiste | 
	1811, 1909 | 
	Avogadro constant | 
	| 1908 | 
	Brownian motion | 
	| Perutz, Max | 
	1958 - 1959 | 
	Protein crystallography | 
	| Petri, Carl Adam | 
	1962 | 
	Petri net | 
	| Piaget, Jean | 
	1924 | 
	Child development | 
	| Piazzi, Giuseppe | 
	1801 | 
	Discovery of an asteroid | 
	| Picard, Jean | 
	1671 | 
	Surveying the earth | 
	| Pickard, Greenleaf Whittier | 
	1874, 1904 | 
	Crystal diode | 
	| Pincus, Gregory | 
	1944 - 1960 | 
	The pill | 
	| Pines, David | 
	1930 - 2014 | 
	Quasiparticles: Plasmon | 
	| Pirro, Jean | 
	1839 - 1887 | 
	International auxiliary language: Universalglot | 
	| Pitts, Walter | 
	1943 | 
	Neural networks | 
	| Planck, Max | 
	1900 | 
	Planck constant | 
	| 1900 | 
	Quanta | 
	| Planté, Gaston | 
	1859, 1881 | 
	Lead-acid battery | 
	| von Platen, Baltzar  | 
	1922, 1926 | 
	Absorption refrigerator | 
	| Playfair, William | 
	1644 - 1869 | 
	Infographics | 
	| Poggendorff, Johann Christian | 
	1841 | 
	Potentiometer | 
	| Poincaré, Henri | 
	1736 - 1895 | 
	Topology | 
	| 1903 | 
	Chaos theory | 
	| 1904 | 
	Lorentz transformations | 
	| Polder, Dirk | 
	1948 | 
	Casimir effect | 
	| Poleni, Giovanni | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Pollak, Karol | 
	1896 | 
	Diode bridge | 
	| Pollender, Aloys | 
	1876 | 
	Bacillus anthracis | 
	| Polyakov, A. N. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Polybius | 
	118 BCE - 1953 | 
	Cipher: Polybius square | 
	| Popeko, Andre Georgievich | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| Poppensieker, Klaus | 
	1982 | 
	Meitnerium
	(atomic number 109) | 
	| 1984 | 
	Hassium
	(atomic number 108) | 
	| Porter, C. E. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Poulton, Edward Bagnall | 
	1890 | 
	Aposematism | 
	| Powell, Cecil | 
	1934, 1947 | 
	Meson | 
	| Power, Henry | 
	1662 | 
	Boyle’s law | 
	| Prandtl, Ludwig | 
	1904 | 
	Boundary layer | 
	| Priestley, Joseph | 
	1774 | 
	Combustion
	(Oxygen - atomic number 8) | 
	| de Prony, Gaspard | 
	1817 | 
	Kater’s pendulum | 
	| Prout, William | 
	1815 | 
	Prout’s hypothesis | 
	| Ptolemy, Claudius | 
	140 | 
	Geocentrism | 
	| Punnett, Reginald | 
	1904 | 
	Genetic linkage | 
	| Pupin, Mihajlo | 
	1899 | 
	Loading coil | 
	| Purkyně, Jan Evangelista | 
	1846 - 1868 | 
	Protoplasm | 
	| Pythagoras | 
	495 BCE | 
	Proof of the Pythagorean theorem | 
	| 1637 | 
	Mersenne’s laws | 
	| Qvist, Bengt Andersson | 
	1778, 1781 | 
	Molybdenum
	(atomic number 42) | 
	| Radushkevich, L. V. | 
	1952 - 1991 | 
	Fullerene | 
	| Ramayya, A. V. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Ramsay, William | 
	1868 - 1895 | 
	Helium
	(atomic number 2) | 
	| 1894 | 
	Argon
	(atomic number 18) | 
	| 1898 | 
	Krypton
	(atomic number 36) | 
	| 1898 | 
	Neon
	(atomic number 10) | 
	| 1898 | 
	Xenon
	(atomic number 54) | 
	| 1899 - 1910 | 
	Radon
	(atomic number 86) | 
	| Rayer, Pierre François Olive | 
	1876 | 
	Bacillus anthracis | 
	| Rayleigh, John William Strutt, Lord | 
	1894 | 
	Argon
	(atomic number 18) | 
	| de Réaumur, René Antoine Ferchault | 
	1730 | 
	Réaumur scale | 
	| Redi, Francesco | 
	1668 | 
	Parasites | 
	| Reich, Ferdinand | 
	1863 | 
	Indium
	(atomic number 49) | 
	| von Reichenstein, Franz-Joseph Müller | 
	1782 | 
	Tellurium
	(atomic number 52) | 
	| Reines, Frederick | 
	1956 | 
	Neutrino | 
	| Willibrord Reisdorf | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| 1982 | 
	Meitnerium
	(atomic number 109) | 
	| 1984 | 
	Hassium
	(atomic number 108) | 
	| Reynolds, Osborne | 
	1851 | 
	Reynolds number | 
	| 1879 | 
	Thermal transpiration | 
	| Remak, Robert | 
	1839 | 
	Cell theory | 
	| Rezzolla, Luciano | 
	2013 | 
	Blitzar | 
	| Richer, Jean | 
	1671 | 
	Gravimetry | 
	| Richter, Hieronymous Theodor | 
	1863 | 
	Indium
	(atomic number 49) | 
	| Riemann, Bernhard | 
	1829 | 
	Non-Euclidean geometry | 
	| Riley, F. D. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| del Río, Andrés Manuel | 
	1803 | 
	Vanadium
	(atomic number 23) | 
	| de Rivaz, François Isaac | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Robbins, Frederick Chapman | 
	1955 | 
	Polio vaccine | 
	| Roberto, James B. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Robins, Benjamin | 
	1672, 1742, 1852 | 
	Magnus effect | 
	| de Rochas, Alphonse Beau | 
	1678 - 1876 | 
	Internal combustion engine | 
	| Rock, John | 
	1944 - 1960 | 
	The pill | 
	| Rohach, Jozef | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| Roloff, Johann Christoff Heinrich | 
	1817 | 
	Cadmium
	(atomic number 48) | 
	| Rømer, Ole | 
	1676 | 
	Speed of light | 
	| 1701 | 
	Rømer scale | 
	| Roots, Francis Marion | 
	1860 | 
	Roots blower | 
	| Roots, Philander | 
	1860 | 
	Roots blower | 
	| Ronalds, Francis | 
	1816 | 
	Electrical telegraph | 
	| Röntgen, Wilhelm | 
	1895 | 
	X-rays | 
	| Roscoe, Henry Enfield | 
	1867 | 
	Vanadium
	(atomic number 23) | 
	| Rose, Heinrich | 
	1801 | 
	Niobium
	(atomic number 41) | 
	| Rosenkranz, George | 
	1944 - 1960 | 
	The pill | 
	| Ross, Ronald | 
	1897 | 
	Malarial parasite | 
	| Rossby, Carl-Gustaf | 
	1939 | 
	Rossby wave | 
	| Rossignol, Antoine and Bonaventure | 
	118 BCE - 1953 | 
	Cipher: Great cipher | 
	| Roux, Pierre Paul Émile | 
	1885 | 
	Rabies vaccine | 
	| Russell, Henry Norris | 
	1920 | 
	Stellar evolution | 
	| Rutherford, Daniel | 
	1772 | 
	Nitrogen
	(atomic number 7) | 
	| Rutherford, Ernest | 
	1896 | 
	Radioactivity | 
   | 1896, 1902 | 
   Magnetic detector | 
	| 1913 | 
	Atom | 
	| 1899 - 1910 | 
	Radon
	(atomic number 86) | 
	| Rykaczewski, M. A. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Rykaczewski, K. P. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Sabin, Albert | 
	1955 | 
	Polio vaccine | 
	| Sagaidak, Roman Nikolaevich | 
	1999 - 2007 | 
	Flerovium
	(atomic number 114) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Sagnac, Georges | 
	1911 - 1920 | 
	Sagnac effect | 
	| Sahl, Ibn | 
	984, 1602, 1621, 1637 | 
	Snell’s law | 
	| Christoph-Clemens Sahm | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| 1982 | 
	Meitnerium
	(atomic number 109) | 
	| Salk, Jonas | 
	1955 | 
	Polio vaccine | 
	| Salpeter, Edwin | 
	1962 - 1964 | 
	Quasar | 
	| Santorio, Santorio | 
	1614 | 
	Metabolism | 
	| Sanger, Margaret | 
	1944 - 1960 | 
	The pill | 
	| Saro, S. | 
	1999 - 2007 | 
	Flerovium
(atomic number 114) | 
	| Sacha, Krzysztof | 
	2017 | 
	Time crystal | 
	| Sato, Nozomi | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Saunders, Edith Rebecca | 
	1904 | 
	Genetic linkage | 
	| Sawatzky, George | 
	1930 - 2014 | 
	Quasiparticles: Orbiton | 
	| Schaaffhausen, Hermann | 
	1856 | 
	Neanderthal man | 
	| Schiaparelli, Giovanni | 
	1877 | 
	Canals on Mars | 
	| Schipfer, Joseph | 
	1839 - 1887 | 
	International auxiliary language: Communicationssprache | 
	| Schleiden, Matthias Jakob | 
	1839 | 
	Cell theory | 
	| Scheele, Carl Wilhelm | 
	1774 | 
	Combustion
	(Oxygen - atomic number 8) | 
	| 1770 - 1774 | 
	Manganese
	(atomic number 25) | 
	| 1774, 1808 | 
	Barium
	(atomic number 56) | 
	| 1774, 1810 | 
	Chlorine
	(atomic number 17) | 
	| 1778, 1781 | 
	Molybdenum
	(atomic number 42) | 
	| 1810 | 
	Chlorine | 
	| Schleyer, Johann Martin | 
	1839 - 1887 | 
	International auxiliary language: Volapük | 
	| Schmidt, Johannes | 
	1922 | 
	Eel metamorphosis | 
	| Karl-Heinz Schmidt | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| 1982 | 
	Meitnerium
	(atomic number 109) | 
	| 1984 | 
	Hassium
	(atomic number 108) | 
	| Schmidt, Maarten | 
	1962 - 1964 | 
	Quasar | 
	| J. R. H. Schneider | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| W. F. W. Schneider | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| Schött, H. J. | 
	1984 | 
	Hassium
	(atomic number 108) | 
	| 1994 | 
	Darmstadtium
	(atomic number 110) | 
	| 1994 | 
	Roentgenium
	(atomic number 111) | 
	| 1996 | 
	Copernicium
	(atomic number 112) | 
	| Schrödinger, Erwin | 
	1925 | 
	Wave-particle duality | 
	| 1926 | 
	Schrödinger equation | 
	| 1930 | 
	Zitterbewegung | 
	| Schönbein, Christian Friedrich | 
	1846 | 
	Guncotton | 
	| Schrieffer, John Robert | 
	1957 | 
	BCS theory | 
	| Schwabe, Heinrich | 
	1843 | 
	Sunspot cycle | 
	| Schwann, Theodor | 
	1839 | 
	Cell theory | 
	| Schwarzschild, Karl | 
	1916 | 
	Schwartzchild radius | 
	| Schweigger, Johann | 
	1791, 1820 | 
	Galvanometer | 
	| Schwinger, Julian | 
	1948 | 
	Quantum electrodynamics | 
	| Scoville, Wilbur | 
	1912 | 
	Scoville scale | 
	| Seaborg, Glenn T. | 
	1940 | 
	Plutonium
	(atomic number 94) | 
	| 1944 | 
	Curium
	(atomic number 96) | 
	| 1944 | 
	Americium
	(atomic number 95) | 
	| 1949 | 
	Berkelium
	(atomic number 97) | 
	| 1950 | 
	Californium
	(atomic number 98) | 
	| 1952 | 
	Mendelevium
	(atomic number 101) | 
	| 1958 | 
	Nobelium
	(atomic number 102) | 
	| 1974 | 
	Seaborgium
	(atomic number 106) | 
	| Seebeck, Thomas Johann | 
	1821, 1834 | 
	Thermoelectric effect | 
	| Sefström, Nils Gabriel | 
	1830 | 
	Vanadium
	(atomic number 23) | 
	| Segrè, Emilio | 
	1937 | 
	Technetium
	(atomic number 43) | 
	| 1940 | 
	Astatine
	(atomic number 85) | 
	| Setterberg, Carl | 
	1860, 1882 | 
	Caesium
	(atomic number 55) | 
	| Shannon, Claude | 
	1948 | 
	Information theory | 
	| Shapley, Harlow | 
	1918 | 
	The universe | 
	| Sharp, Tom | 
	2018 | 
	Shɑrpεn | 
	| Shaughnessy, Dawn | 
	2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Shchegolev, V. A.
		
		 | 
	1958 | 
	Nobelium
	(atomic number 102) | 
	| 1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| Shirokovsky, I. V. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Shockley, William | 
	1947 | 
	Transistor | 
	| Siemens, Carl Wilhelm | 
	1871 | 
	Resistance thermometer | 
	| Sikkeland, Torbjørn | 
	1958 | 
	Nobelium
	(atomic number 102) | 
	| 1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| Skinner, B. F. | 
	1938 | 
	Radical behaviorism | 
	| Skobelev, Nikolai Konstantinovich | 
	1970 | 
	Dubnium
	(atomic number 105) | 
	| Skyrme, Tony | 
	1930 - 2014 | 
	Quasiparticles: Skyrmion | 
	| Smalley, Richard | 
	1952 - 1991 | 
	Fullerene | 
	| Smith, J. L. B. | 
	1938 | 
	Coelacanth | 
	| Smith, William | 
	1815 | 
	Fossil sequences | 
	| Snellius, Willebrord | 
	984, 1602, 1621, 1637 | 
	Snell’s law | 
	| Snow, John | 
	1854 | 
	Cholera and the pump | 
	| Sobrero, Ascanio | 
	1847 | 
	Nitroglycerin | 
	| Soddy, Frederick | 
	1896 | 
	Radioactivity | 
	| 1913 | 
	Radioactive displacement law | 
	| 1913 - 1918 | 
	Protactinium | 
	| 1922 | 
	Isotope | 
	| Sommerfeld, Arnold | 
	1851 | 
	Reynolds number | 
	| Soret, Jacques-Louis | 
	1878 - 1879 | 
	Holmium
	(atomic number 67) | 
	| Spallanzani, Lazzaro | 
	1765 | 
	Spontaneous generation | 
	| Spence, Frances | 
	1946 | 
	ENIAC | 
	| Stanier, Roger | 
	1925, 1962 | 
	Prokaryote and eukaryote | 
	| Stark, Johannes | 
	1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| Stefan, Josef | 
	1879 | 
	Stefan-Boltzmann law | 
	| Steno, Nicolas | 
	1669 | 
	Stratigraphy | 
	| Sternberg, George Miller | 
	1881 | 
	Streptococcus pneumoniae | 
	| Stevens, Nettie Maria | 
	1910 | 
	Genes | 
	| Stirling, Robert | 
	1816 | 
	Stirling engine | 
	| Stokes, George Gabriel | 
	1847 | 
	Stokes drift | 
	| 1851 | 
	Reynolds number | 
	| Stookey, S. Donald | 
	1953 | 
	CorningWare | 
	| Størmer, Carl | 
	1908 - 1958 | 
	Van Allen belts | 
	| Störmer, Horst Ludwig | 
	1930 - 2014 | 
	Quasiparticles: Fractional quantum Hall effect | 
	| Stoyer, Mark A. | 
	2000 | 
	Livermorium
(atomic number 116) | 
	| 2004 | 
	Moscovium
(atomic number 115) | 
	| 2006 | 
	Oganesson
(atomic number 118) | 
	| 2009 | 
	Tennessine
(atomic number 117) | 
	| Stoyer, Nancy J. | 
	2000 | 
	Livermorium
(atomic number 116) | 
	| 2004 | 
	Moscovium
(atomic number 115) | 
	| 2006 | 
	Oganesson
(atomic number 118) | 
	| Strasburger, Eduard | 
	1878 | 
	Mitosis | 
	| Strassmann, Fritz | 
	1942 | 
	Nuclear energy | 
	| Street, Kenneth, Jr. | 
	1950 | 
	Californium
	(atomic number 98) | 
	| Stromeyer, Friedrich | 
	1817 | 
	Cadmium
	(atomic number 48) | 
	| Sturtevant, Alfred Henry | 
	1910 | 
	Genes | 
	| Subbotin, V. G. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Suda, Toshimi | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Sudowe, R. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Sueki, Keisuke | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Suess, Eduard | 
	1885 | 
	Mountain formation | 
	| Sukhov, A. M. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Sulzer, Friedrich Gabriel | 
	1790, 1808 | 
	Strontium
	(atomic number 38) | 
	| Sutton, Walter | 
	1902 | 
	Boveri-Sutton chromosome theory | 
	| Swammerdam, Jan | 
	1669 | 
	Epigenesis | 
	| Szent-Györgyi, Albert | 
	1913 - 1930 | 
	Vitamin discoveries: C | 
	| Szilard, Leo | 
	1922, 1926 | 
	Absorption refrigerator | 
	| Szostak, Jack W. | 
	1971 - 1977 | 
	Telomere | 
	| Tacke, Ida | 
	1908, 1925 | 
	Rhenium
	(atomic number 75) | 
	| Tait, Peter Guthrie | 
	1771, 1885 | 
	Knot theory | 
	| Tamm, Igor | 
	1930 - 2014 | 
	Quasiparticles: Phonon | 
	| 1932 | 
	Phonon | 
	| 1934 | 
	Cherenkov radiation | 
	| Teisserenc de Bort, Léons | 
	1902 | 
	Stratosphere | 
	| Teitelbaum, Ruth  | 
	1946 | 
	ENIAC | 
	| Temin, Howard | 
	1970 | 
	Reverse transcriptase | 
	| Tennant, Smithson | 
	1750 | 
	Platinum
	(atomic number 78) | 
	| 1804 | 
	Platinum group metals
	(atomic numbers 76 and 77) | 
	| Ter-Akopian, G. M. | 
	1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| Tesla, Nikola | 
	1705, 1894 | 
	Gas-discharge lamp | 
	| 1913 | 
	Tesla turbine | 
	| Thales of Miletus | 
	546 BCE | 
	Thales’ theorem | 
	| 546 BCE | 
	Triboelectric effect | 
	| Thénard, Louis Jacques | 
	1808 | 
	Boron
	(atomic number 5) | 
	| 1823 | 
	Silicon
	(atomic number 14) | 
	| Theophrastus | 
	320 BCE | 
	Botany | 
	| Thompson, Benjamin | 
	1847 | 
	Laws of thermodynamics | 
	| Thompson, Christopher | 
	1992 | 
	Magnetar | 
	| Thompson, Stanley Gerald | 
	1949 | 
	Berkelium
	(atomic number 97) | 
	| 1950 | 
	Californium
	(atomic number 98) | 
	| 1952 | 
	Mendelevium
	(atomic number 101) | 
	| Thomson, Joseph John | 
	1897 | 
	Electron | 
	| Thomson, James | 
	1855, 1865 | 
	Marangoni effect | 
	| Thomson, Thomas | 
	1823 | 
	Silicon
	(atomic number 14) | 
	| Thorne, Kip | 
	1967 | 
	LIGO | 
	| B. Thuma | 
	1981 | 
	Bohrium
	(atomic number 107) | 
	| Tinbergen, Nikolaas | 
	1935 | 
	Instincts | 
	| Tipu Sultan | 
	1780 | 
	Mysorean rockets | 
	| Tokanai, Fuyuki | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Tolpygo, Kirill | 
	1930 - 2014 | 
	Quasiparticles: Polariton | 
	| 1961 | 
	Flexoelectricity | 
	| Tomonaga, Shin'ichirō | 
	1930 - 2014 | 
	Quasiparticles: Holon and spinon | 
	| 1948 | 
	Quantum electrodynamics | 
	| Tonks, Lewi | 
	1928 - 1929 | 
	Plasma oscillation | 
	| Torricelli, Evangelista | 
	1643 | 
	Atmospheric pressure | 
	| Toussaint, Jean Joseph Henri | 
	1880 - 1881 | 
	Anthrax vaccine | 
	| Towneley, Richard | 
	1662 | 
	Boyle’s law | 
	| Townes, Charles Hard | 
	1917 - 1960 | 
	Stimulated emission | 
	| Townsend, John Sealy | 
	1897 | 
	Townsend discharge | 
	| 1935 | 
	Geiger counter | 
	| Travers, Morris | 
	1898 | 
	Krypton
	(atomic number 36) | 
	| 1898 | 
	Neon
	(atomic number 10) | 
	| 1898 | 
	Xenon
	(atomic number 54) | 
	| Trillat, Auguste | 
	1893 | 
	Galalith | 
	| Trithemius, Johannes | 
	1499 | 
	Steganography | 
	| Troost, Louis Joseph | 
	1801 | 
	Niobium
	(atomic number 41) | 
	| Tsai, Yung-su | 
	1971 - 1977 | 
	Tau | 
	| Tsui, Daniel | 
	1930 - 2014 | 
	Quasiparticles: Fractional quantum Hall effect | 
	| Tsyganov, Yu. S. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2004 | 
	Moscovium
	(atomic number 115) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
	(atomic number 117) | 
	| Turing, Alan | 
	1946 | 
	Computer | 
	| 1950 | 
	Turing test | 
	| 1952 | 
	Turing pattern | 
	| Twining, Alexander | 
	1805 - 1876 | 
	Vapor-compression refrigeration | 
	| Twort, Frederick | 
	1915, 1917 | 
	Bacteriophage | 
	| Tyndall, John | 
	1863 | 
	Greenhouse effect | 
	| Ulam, Stanislaw | 
	1948 | 
	Cellular automaton | 
	| de Ulloa, Antonio | 
	1750 | 
	Platinum
	(atomic number 78) | 
	| Urbain, Georges | 
	1878, 1907 | 
	Ytterbium
	(atomic number 70) | 
	| 1907 | 
	Lutetium
	(atomic number 71) | 
	| Urey, Harold | 
	1931 | 
	Deuterium | 
	| 1953 | 
	Abiogenesis | 
	| Urquhart, Thomas | 
	1647 - 1678 | 
	Philosophical language: Logopandecteision | 
	| Utyonkov, V. K. | 
	2000 | 
	Livermorium
	(atomic number 116) | 
	| 2006 | 
	Oganesson
	(atomic number 118) | 
	| 2009 | 
	Tennessine
(atomic number 117) | 
	| Vail, Alfred | 
	1833 | 
	Electrical telegraph | 
	| Valasek, Joseph | 
	1920 | 
	Ferroelectricity | 
	| Van Allen, James | 
	1908 - 1958 | 
	Van Allen belts | 
	| Vandermonde, Alexandre-Théophile | 
	1771, 1885 | 
	Knot theory | 
	| Vavilov, Nikolai Ivanovich | 
	1923 | 
	Crop diversity | 
	| Vavilov, Sergey Ivanovich | 
	1934 | 
	Cherenkov radiation | 
	| Vernier, Pierre | 
	1631 | 
	Vernier scale | 
	| Le Verrier, Urbain Jean Joseph | 
	1846 | 
	Discovery of Neptune | 
	| Vesalius, Andreas | 
	1543 | 
	Human anatomy | 
	| Villard, Paul Ulrich | 
	1900 | 
	Gamma ray | 
	| da Vinci, Leonardo | 
	1450, 1481 | 
	Hygrometer | 
	| 1485 | 
	Parachute | 
	| 1699 | 
	Tribology | 
	| de Villeneuve, Joachim Faiguet | 
	1839 - 1887 | 
	International auxiliary language: Langue nouvelle | 
	| Virchow, Rudolf | 
	1839 | 
	Cell theory | 
	| 1858 | 
	Communities of cells | 
	| Volta, Alessandro | 
	1799 | 
	Electric battery | 
	| Voigt, Woldemar | 
	1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| Voinov, A. A. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Vostokin, G. K. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| De Vries, Hugo | 
	1909 | 
	Mutationism | 
	| van der Waals, Johannes Diederik | 
	1873 | 
	Changes of state | 
	| Walcott, Charles Doolittle | 
	1909 | 
	Burgess shale | 
	| Wald, George | 
	1956 | 
	Visual phototransduction | 
	| von Waldeyer-Hartz, Wilhelm | 
	1878 | 
	Mitosis | 
	| Wallace, Alfred Russel | 
	1859 | 
	Wallace line | 
	| 1890 | 
	Aposematism | 
	| Wallis, John | 
	1656 | 
	Infinite and infinitesimal | 
	| Walton, John R. | 
	1958 | 
	Nobelium
	(atomic number 102) | 
	| Watson, James | 
	1953 | 
	DNA structure | 
	| Watt, James | 
	1765 | 
	Steam engine | 
	| Weber, Wilhelm Eduard | 
	1833 | 
	Electrical telegraph | 
	| Wedgwood, Josiah | 
	1783 | 
	Wedgwood scale | 
	| Wegener, Alfred Lothar | 
	1912 | 
	Continental drift | 
	| Wenham, Francis Herbert | 
	1871 | 
	Wind tunnel | 
	| Weiss, Pierre | 
	1907 | 
	Magnetic domain | 
	| 1911 | 
	Weiss magneton | 
	| Weiss, Rainer | 
	1967 | 
	LIGO | 
	| von Weizsäcker, Carl Friedrich | 
	1920 | 
	Stellar evolution | 
	| Weller, Thomas Huckle | 
	1955 | 
	Polio vaccine | 
	| Wells, Horace | 
	1842 - 1846 | 
	Anesthesia | 
	| Wheatstone, Charles | 
	118 BCE - 1953 | 
	Cipher: Playfair cipher | 
	| 1833, 1843 | 
	Wheatstone bridge | 
	| 1838 | 
	Electrical telegraph | 
	| Whewell, William | 
	1833 | 
	“Scientist” | 
	| Whipple, George | 
	1913 - 1930 | 
	Vitamin discoveries: B12 | 
	| Whitehurst, John | 
	1772, 1796 | 
	Hydraulic ram | 
	| Wilcke, Johan Carl | 
	1757 | 
	Triboelectric series | 
	| Wilczek, Frank | 
	2017 | 
	Time crystal | 
	| Wilk, P. A. | 
	2009 | 
	Tennessine
	(atomic number 117) | 
	| Wilkins, John | 
	1647 - 1678 | 
	Philosophical language: Real Character | 
	| 1668 | 
	Metric system | 
	| Winkler, Clemens | 
	1886 | 
	Germanium
	(atomic number 32) | 
	| Wilson, E. O. | 
	1975 | 
	Sociobiology | 
	| Windaus, Adolf | 
	1913 - 1930 | 
	Vitamin discoveries: D | 
	| Winkel, Dietrich Nikolaus | 
	1814 - 1815 | 
	Metronome | 
	| Woese, Carl | 
	1999 | 
	Three-domain system | 
	| Wollaston, William Hyde | 
	1804 | 
	Platinum group metals | 
	| Wöhler, Friedrich | 
	1828 | 
	Synthesis of urea | 
	| Wright, Orville | 
	1903 | 
	Airplane | 
	| Wright, Sewall | 
	1918 | 
	Neo-Darwinism | 
	| 1922 | 
	Coefficient of relationship | 
	| Wright, Wilbur | 
	1903 | 
	Airplane | 
	| Yamaguchi, Takayuki | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Yang, Chen-Ning | 
	1956 | 
	Parity violation | 
	| Yao, Norman | 
	2017 | 
	Time crystal | 
	| Yeremin, A. V. | 
	2004 | 
	Moscovium
	(atomic number 115) | 
	| Yi Xing | 
	2400 BCE - 1820 CE | 
	Computing devices | 
	| Yoneda, Akira | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Yoshida, Atsushi | 
	2012 | 
	Nihonium
	(atomic number 113) | 
	| Young, Thomas | 
	1800 | 
	Wave nature of light | 
	| Yukawa, Hideki | 
	1934, 1947 | 
	Meson | 
	| Zamenhof, L. L. | 
	1839 - 1887 | 
	International auxiliary language: Esperanto | 
	| Zeeman, Pieter | 
	1845 - 1913 | 
	Magneto-optic and electro-optic effects | 
	| Zeldovich, Yakov | 
	1962 - 1964 | 
	Quasar | 
	| Zhabotinsky, Anatoly | 
	1951 | 
	Chemical oscillations | 
	| Zimmermann, Phil | 
	1976 - 1991 | 
	Public-key cryptography | 
	| Zvara, I. | 
	1961 - 1971 | 
	Lawrencium
	(atomic number 103) | 
	| Zweig, George | 
	1964 | 
	Quark | 
	| Zwicky, Fritz | 
	1933 | 
	Neutron star |