Theory Collection

Charles Darwin
(Original Caption) Ca. 1855-Portrait of Charles Robert Darwin (1809-1882), the great naturalist

Title Page from the Origin of Species
(Original Caption) 1859-Title page of Charles Darwin's revolutionary book, "The Origin of the Species, " published in 1859

John von Neumann
John von Neuman, American mathematician. Contributed to number theory and theory games

Francisco Redi, Headshot; Physician, Poet
(Original Caption) Francesco Redi: 1626? - 1697/98. Italian physician, naturalist and poet. Portable, head and shoulders. First to test the theory of spontaneous generation. Undated

Title Page from Thomas Paine's Common Sense
(Original Caption) Title page from Thomas Paine's "Common Sense." Printed by R. Bell in Philadelphia in 1776

Harry Stack Sullivan, Psychiatrist, Seated
(Original Caption) Harry Stack Sullivan (1892-1949), American psychiatrist. Proposed behavioral theory. Half-length photograph

Engraving Of Sphere Model Of The Heavens
(Original Caption) An armillary sphere, a model of the heavens. Undated engraving

Niels Bohr, Danish Physicist
(Original Caption) Portrait of Niels Bohr (1885-1962), Danish physicist. Proposed a theory of atomic structure based on Planck's quantum theory, and was awarded the 1922 Nobel Prize in physics

Physicist Sir James Chadwick
(Original Caption) James Chadwick, English physicist; "discoverer" of the neutron (1932); awarded the 1935 Nobel Prize for Physics. Undated photograph

Painting of Carl Frederick Gauss
(Original Caption) Carl Friedrich Gauss: (1777-1855), famed mathematician. Undated painting

Drawing Of Round Copernican Solar System
(Original Caption) 1661-Drawing of Copernicus world system. The sun is in the center with the earth and moon as planets. From "Harmonica Macrocosmia" by Cellarius

Professor Erwin Schrodinger
(Original Caption) 11/18/1933-The 1933 Nobel Prize in Physics has been awarded jointly to Professor P.H.M

Abbe Georges Le Maitre Holding Medal
(Original Caption) 1/16/1934-Abbe Georges Le Maitre of Belgium with Mendal Medal

George Lemaitre and Father Stanford
(Original Caption) 1/16/1934-Abbe George LeMaitre and Father Stanford

Dr. Alfred Kinsey Seated; Wearing Bowtie
(Original Caption) Dr. Alfred Kinsey, author of the "Kinsey Report, " a survey of the sexual behavior of American men and women. Undated photograph

Charles Darwin
Ca. 1855-Portrait of Charles Robert Darwin (1809-1882), the great naturalist

Torsion Balance Illustration
(Original Caption) - Charles-Augustin de Coulomb (1736-1806) French Physicist

Illustration of Copernican and Ptolemaic Views of the Universe
Illustration of different conceptions of the solar system from the 18th century. Figure I depicts the Ptolemaic Theory, Figure II, the Copernican Theory

HMS Beagle in Straits of Magellan
(Original Caption) 1890-Illustration of the H.M.S. Beagle carrying Charles Darwin's expedition in the Straits of Magellan, Mt. Sarmiento in the distance

John Dalton's Table Of Elements
(Original Caption) John Dalton's table of elements of 1803 illustrating his atomic theory

Harold Lyons Explaining Atomic Clock Experiment
(Original Caption) 7/1/59-Culver City

Domino tiles
UNITED STATES - CIRCA 1960s: Domino tiles. (Photo by H. Armstrong Roberts/Retrofile/Getty Images)

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