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Quick Search: (Enter name, year, or keyword) SAMPLE PREVIEW OF CALENDAR ENTRIES: History of Science Women in Medicine and Science History of Mathematics History of Chemistry |
Chronology of the History of Science |
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Pauli,
Wolfgang Born: 4/25/1900 |
1900 AD | |
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1900 AD |
Lord Rayleigh, statistical derivation of short wavelength black body law
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1900 AD |
Ernest Rutherford, first determination of a radioactive half-life
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1900 AD |
Antoine Henri Becquerel, suggests that beta rays are electrons
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Brunel,
Georges Died: 7/23/1900 |
1900 AD | |
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Walker,
J.J. Died: 2/15/1900 |
1900 AD | |
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1900 AD |
Pyotr Lebedev, radiation pressure measured
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1901 AD |
Lebedev shows light exerts pressure.
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1901 AD |
Zeeman discovers that source of light in intense magnetic fields produces several split spectral lines.
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1901 AD |
Hollerith starts his own company, the Tabulating Machine Company, to market his data processing machines.
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1901 AD |
First transatlantic wireless telegraph
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1901 AD |
Guglielmo Marconi, Transmission of Morse signals across the Atlantic
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Heisenberg,
Werner Born: 12/5/1901 |
1901 AD | |
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Eyring,
Henry Born: 2/20/1901 |
1901 AD | |
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Pauling,
Linus Born: 2/28/1901 |
1901 AD | |
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Anderson,
Dorothy Born: 5/15/1901 |
1901 AD | |
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1901 AD |
Marconi sends radio signal from England to Newfoundland.
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Pittman,
Margaret Born: 1/20/1901 |
1901 AD | |
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1901 AD |
EMIL ADOLF VON BEHRING for his work on serum therapy, especially its application against diphtheria, by which he has opened a new road in the domain of medical science and thereby placed in the hands of the physician a victorious weapon against illness and deaths.
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Kleegman,
Sophia Born: 7/8/1901 |
1901 AD | |
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Bari,,
Nina Born: 11/19/1901 |
1901 AD | |
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Schlomich,
Oskar Died: 2/7/1901 |
1901 AD | |
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Hennessy,
Henry Died: 3/8/1901 |
1901 AD | |
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Roualt,
Francois Marie Died: 4/1/1901 |
1901 AD | |
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Lindman,
Christian Died: 1/10/1901 |
1901 AD | |
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Fermi,
Enrico Born: 9/29/1901 Died: 11/28/1954 |
1901 AD | |
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Lawrence,
E.O. Born: 8/8/1901 |
1901 AD | |
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Tait,
Peter Guthrie Died: 7/4/1901 |
1901 AD | |
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Alexander,
Hattie Born: 4/5/1901 |
1901 AD | |
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1901 AD |
Max Planck, determination of Planck's constant, Boltzmann's constant, Avogadro's number and the charge on electron
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1902 AD |
James Jeans finds the length scale required for gravitational pertrubatations to grow in a static nearly homogeneous medium
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1902 AD |
Kennelly (U.S.) and Heaviside (England) independently discovered the ionosphere
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1902 AD |
Discovery of Tyrannosaurus Rex
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1902 AD |
SIR RONALD ROSS for his work on malaria, by which he has shown how it enters the organism and thereby has laid the foundation for successful resesarch on this disease and methods of combating it.
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1902 AD |
Kelvin, Thomson, plum pudding model of the atom
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1902 AD |
Rutherford and Soddy, theory of transmutation by radiation and first use of the term "atomic energy"
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1902 AD |
Philipp Lenard, intensity law in photoelectric effect
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1902 AD |
Theodor Svedberg suggests that fluctuations in molecular bombardment cause the Brownian motion
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Wigner,
Eugene P. Born: 11/17/1902 |
1902 AD | |
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Tiselius,
A. Born: 8/10/1902 |
1902 AD | |
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1902 AD |
Philipp Lenard observes that maximum photoelectron energies are independent of illuminating intensity but depend on frequency
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Brouwer,
Dirk Born: 9/1/1902 Died: 1/31/1966 |
1902 AD | |
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McClintock,
Barbara Born: 6/16/1902 |
1902 AD | |
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Klein,
Hermann Died: 10/12/1902 |
1902 AD | |
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Dunbar,
Helen Flanders Born: 5/14/1902 |
1902 AD | |
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Lassar,
Edna Kramer Born: 5/11/1902 |
1902 AD | |
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Baumgartner,
Leona Born: 8/18/1902 |
1902 AD | |
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Strassmann,
Fritz Born: 2/22/1902 |
1902 AD | |
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Dirac,
P.A.M. Born: 8/8/1902 |
1902 AD | |
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1903 AD |
Crookes shows that alpha particles cause zinc blende to luminesce.
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1903 AD |
Ernest Rutherford, alpha particles have a positive charge
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1903 AD |
Johannes Stark, the power of the sun may be due to genesis o chemical elements
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1903 AD |
Curie and Laborde, radioactive energy released by radium is large
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1903 AD |
The botanist De Vries discovered mutations in plants
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1903 AD |
NIELS RYBERG FINSEN in recognition of his contribution to the treatment of diseases, especially lupus vulgaris, with concentrated light radiation, whereby he has opened a new avenue for medical science.
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1903 AD |
Philipp Lenard, model of atom as two separated opposite charges
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1903 AD |
Philipp Lenard, model of atom as two separated opposite charges
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Kolmogorov,
A.N. Born: 4/25/1903 |
1903 AD | |
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1903 AD |
Nikola Tesla, a Yugoslavian who worked for Thomas Edison, patents electrical logic circuits called gates or switches.
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1903 AD |
Wright brothers fly at Kitty Hawk.
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Onsager,
Lars Born: 11/27/1903 |
1903 AD | |
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1903 AD |
Wright brothers' airplane remained in flight for 12 seconds
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Lorenz,
Konrad Born: 11/7/1903 |
1903 AD | |
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Lonsdale,
Kathleen Born: 1/28/1903 |
1903 AD | |
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von Neumann,
John Born: 12/28/1903 Died: 2/8/1957 |
1903 AD | |
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Gibbs,
J.W. Died: 4/28/1903 |
1903 AD | |
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Fluegge-Lotz,
Irmgard Born: 7/16/1903 |
1903 AD | |
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McCoy,
Elizabeth Born: 2/1/1903 |
1903 AD | |
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van der Waerden,
Bartel |
1903 AD | |
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Stokes,
G.G. Died: 2/2/1903 |
1903 AD | |
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1903 AD |
Nikola Tesla, a Yugoslavian who worked for Thomas Edison, patents electrical logic circuits called gates or switches.
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Goldsmith,
Grace Born: 4/8/1904 |
1904 AD | |
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Cartan,
Henri |
1904 AD | |
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1904 AD |
Albert Einstein, energy-frequency relation of light quanta
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1904 AD |
Hendrik Lorentz, the completed Lorentz -Albert Einstein transformations
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1904 AD |
Hantaro Nagaoka, planetary model of the atom
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1904 AD |
Ambrose Flemming, diode valve and rectifier
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1904 AD |
Henri Poincare, conjectured light speed as physical limit
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1904 AD |
Ernest Rutherford, age of Earth by radioactvity dating
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1904 AD |
IVAN PETROVICH PAVLOV in recognition of his work on the physiology of digestion, through which knowledge on vital aspects of the subject has been transformed and enlarged.
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1904 AD |
Fleming invented vacuum tube diode
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1904 AD |
Genetics experiments by Thomas Morgan, discovery of sex linked mutations (among a group of fruit flies with normal red or unusual white eyes, all of the white eyed offspring were male).
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1904 AD |
Barkla shows x-rays are electromagnetic.
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Piccard,
Sophie Born: 9/27/1904 |
1904 AD | |
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Herberg,
Gerhard Born: 12/25/1904 |
1904 AD | |
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Hefner-Altneck,
F.v. Died: 1/7/1904 |
1904 AD | |
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Picard,
Sophie Born: 9/27/1904 |
1904 AD | |
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1904 AD |
Fleming invents the rectifier.
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Moufang,,
Ruth Born: 1/10/1905 |
1905 AD | |
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1905 AD |
Albert Einstein, one of the few scientists to take Planck's ideas seriously, proposes a quantum of light (the photon) which behaves like a particle. Einstein's other theories explained the equivalence of mass and energy, the particle-wave duality of photons, the equivalence principle, and special relativity.
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Artobolevski,
Ivan I. Born: 10/9/1905 |
1905 AD | |
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Jansky,
Karl Born: 10/22/1905 |
1905 AD | |
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1905 AD |
Albert Einstein explains the photoelectric effect
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Anderson,
Carl D. Born: 9/3/1905 |
1905 AD | |
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Cinquini-Cibrario,,
Maria Born: 9/6/1905 |
1905 AD | |
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Fenchel,
Kate Born: 12/21/1905 |
1905 AD | |
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1905 AD |
Einstein publishes three papers - one on Brownian motion confirms existence of atoms, another on photoelectric effect confirms existence of photons, third announces special relativity.
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Segre,
Emilio Born: 2/1/1905 |
1905 AD | |
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1905 AD |
Albert Einstein completes his theory of special relativity and states the law of mass-energy conservation
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1905 AD |
Albert Einstein, explains Brownian motion by kinetic theory
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