Important scientists

 

H

 Fritz Haber

(1868 - 1934)  chemist  ammonia synthesis, father of chemical warfare

 George Hadley

(1685 - 1768)  meteorologist  Trade winds

 Ernst Haeckel

(1834 - 1919)  biologist  named Protista and many species

 Otto Hahn

(1879 - 1968)  physicist  splitting uranium (or nuclear fission) -with Meitner

 John Haldane

(1892 - 1964)  geneticist  population genetics

 John S Haldane

(1860 - 1936)  physiologist  nerve gases and breathing apparatus
 Edwin Hall (1855 - 1938)  physicist  thermoelectrics, Hall effect
 John  Hall (1934 - )  physicist  spectroscopy, frequency comb (with Hansch)

 Edmond Halley

(1656 - 1742)  astronomer  Halley's comet

 Jean d’Halloy

(1783 - 1875)  geologist  geological surveys
 Theodor Hansch (1941 - )  physicist  spectroscopy, frequency comb (with Hall)

 Charles Hapgood

(1904 - 1982)  geologist  Earth's crust
 Arthur Harden (1865 - 1940)  biochemist  sugar fermentation, enzymes (with von Euler-Chelpin)

 James Hargreaves

(1722 - 1778)  weaver  inventor of spinning jenny
 John Harsanyi (1920 - 2000)  economist  game theory, Bayesian games
 Haldan Hartline (1903 - 1983)  physiologist  vision, retinal pigments, rhodopsin (with Granit, Wald)

 Nicolas Hartsoeker

(1656 - 1725)  physicist  microscope
 Leland Hartwell (1939 - )  biochemist  cell cycle in yeast

 William Harvey

(1578 - 1657)  physician  blood circulation
 Odd Hassel (1897 - 1981)  chemist  conformational analysis (with Barton)
 Herbert Hauptmann (1917 - ) mathematician  phase problem in X-ray crystallography (with Karle)
 Harald zur Hausen (1936 - )  virologist  papilloma virus, cervical cancer

 Stephen Hawking

(1942 - )  physicist  black holes; see also own website
 Walter Haworth (1883 - 1950)  biochemist  vitamin C, carbohydrate metabolism
 Richard Heck (1931 - )  chemist  Heck reaction, Pd-catalyzed coupling reactions (with Negishi, Suzuki)
 Alan Heeger (1936 - )  physicist  conductive polymers (with MacDiarmid, Shirakawa)

 Werner Heisenberg

(1901 - 1976)  theoretical physicist  uncertainty principle

 Eleanor Helin

(1932 - 2009)  astronomer  asteroids and comets

 Hermann von Helmholtz

(1821 - 1894)  physician  vision, conservation of energy
 Philip Hench (1896 - 1965)  physician  adrenal cortex hormones (with Kendall, Reichstein)

 Zhang Heng

(78 - 139)  mathematician  invented seismometer for earthquakes

 Joseph Henry

(1797 - 1878)  physicist  electrical inductance, electric motor
 Dudley Herschbach (1932 - )  chemist  crossed molecular beam. chemical reaction (with Lee, Polanyi)

 Frederick Herschel

(1738 - 1822)  astronomer  Uranus and its moons
 Alfred Hershey (1908 - 1997)  bacteriologist  antibiotic resistance, mutation, phage (with Delbruck, Luria)
 Avram Hershko (1937 - )  biochemist  ubiquitin-mediated protein degradation, proteasome (with Ciechanover, Rose)
 Gustav Hertz (1887 - 1975)  physicist  Franck-Hertz experiment, electron collisions (with Franck)

 Heinrich Hertz

(1857 - 1894)  physicist  electromagnetic (radio) waves
 Gerhard Hertzberg 1904 -1999)  chemist  atomic spectroscopy, free radicals
 Germain Hess (1802 - 1850)  chemist  Hess' Law in thermochemistry
 Victor Hess (1883 - 1964)  physicist  discovered cosmic rays (with )
 Walter Hess (1881 - 1973)  physiologist  brain mapping (with Moniz)
 George de Hevesy (1885 - 1966)  chemist  radioactive tracers
 Antony Hewish (1924 - )  astronomer  radio telescope, aperture synthesis (with Ryle)
 Corneille Heymans (1892 - 1968)  physiologist  blood pressure, blood oxygen content
 Jaroslav Heyrovsky (1890 - 1967)  chemist  electroanalytical chemistry, polarography

 Peter Higgs

(1929 - )  theoretical physicist  elementary particles, bosons
 David Hilbert (1862 - 1943)  mathematician  invariant theory, Hilbert space, Hilbert's axioms
 Archibald Hill (1886 - 1977)  physiologist  biophysics, mechanical work in muscles (with Meyerhof)
 Cyril Hinshelwood (1897 - 1967)  chemist  chemical reaction, reaction mechanism (with Semenov)

 Hipparchus

(190 - 120 BC)  astronomer  Sun and moon motion, star maps

 Hippocrates

(460-377 BC)  physician  father of medicine
 George Hitchings (105 - 1998)  pharmacologist  chemotherapy, chemotherapeutic drugs (with Elion)
 Alan Hodgkin (1914 - 1998)  physiologist  nerve action potential (with Huxley)

 Dorothy Hodgkin

(1910-1994)  chemist  inventor of protein crystallography
 Jacobus van 't Hoff (1852 - 1911)  chemist  chemical kinetics, osmotic pressure, stereochemistry
       
 Raold Hoffmann (1937 - )  chemist  molecular orbitals, reaction mechanisms (with Fukui), Woodward-Hoffmann rules (with Woodward)
 Robert Hofstadter (1915 - 1990)  physicist  electron scattering, atomic nucleus, nucleons (with Mössbauer)

 Philippus von Hohenheim

(1493 - 1541)  physician  pioneer of chemotherapy
 Robert Holley (1922 - 1993)  biochemist  tRNA structure, genetic code (with Khorana, Nirenberg)

 Arthur Holmes

(1890 - 1965)  geologist  radiometric dating
 Gerardus 't Hooft (1946 - )  theoretical physicist  gauge theory, electroweak interactions (with Veltman)

 Robert Hooke

(1635 - 1703)  physicist  elasticity (Hooke's Law)

 Joseph Hooker

(1814 - 1879)  botanist  founder of geographical botany

 Frederick Hopkins

(1861 - 1947)  biochemist  discovered vitamins (with Eijkman) and tryptophan

 William Hopkins

(1793 - 1866)  geologist  centre of Earth

 Grace Hopper

(1906 - 1992)  computer scientist  first compiler for programming languages
 Robert Horvitz (1947 - )  biologist  Caenorhabditis elegans neural development (with Brenner, Sulston)
 Geoffrey Hounsfield (1919 - 2004)  engineer  X-ray computed tomography (with Cormack)
 Bernardo Houssay (1887 - 1971)  biochemist  pituitary hormones, blood sugar, glycogen (with Cori)

 Luke Howard

(1772 - 1864)  meteorologist  naming cloud types

 Elias Howe

(1819 - 1867)  inventor  sewing machine

 Francis Howell

(1925 - 2007)  anthropologist  primate evolution

 Fred Hoyle

(1915 - 2001)  astronomer  stellar nucleosynthesis

 Edwin Hubble

(1889 - 1953)  astronomer  Doppler red shift, Hubble telescope
 David Hubel (1926 - )  physiologist  visual system, ocular dominance (with Wiesel)
 Robert Huber (1937 - )  biochemist  X-ray crystallography, photosynthetic reaction center (with Deisenhofer, Michel)
 Charles Huggins (1901 - 1997)  physician  hormonal control of Prostate ancer (with Rous)
 Russell Hulse (1950 - )  physicist  pulsar, gravitational waves (with Taylor)

 Alexander von Humboldt

(1769 - 1859)  naturalist  South America
 Tim Hunt (1943 - )  biochemist  cyclins, kinases, cell cycle (with Nurse)

 John Hunter

(1728 - 1793)  surgeon  human bone collector, father of modern surgery
 Piet Hut  (1952 - )  astrophysicist  Barnes-Hut simulation algorithm for star motion

 Charles Hutton

(1737 - 1823)  mathematician  mathematical tables

 James Hutton

(1726 - 1797)  geologist  father of modern geology
 Andrew Huxley (1917 - )  neurophysiologist  nerve action potential (with Hodgkin)

 Thomas Huxley

(1825 - 1895)  biologist  evolution Darwin supporter

 Christian Huygens

(1629 - 1695)  mathematician  light waves, pendulum clock