Carl Merck, German naturalist
Martin Lichtenstein, German physician
Christian Ehrenberg, German naturalist
Hermann von Wissmann, German explorer
Friedrich Jahn, German gymnastics teacher
Heinrich Schliemann, German archaeologist
Louis Stromeyer, German surgeon, artwork
Carl Ritter, German geographer
Prokop Divis, Czech scientist
Alfred Brehm, German zoologist
Hermann Kolbe, German chemist
Wilhelm Foerster, German astronomer
Carl Vogt, German naturalist
Arthur Schopenhauer, German philosopher
Heinrich Barth, German explorer
Adolf Bastian, German ethnologist
Bernhard von Gudden, German anatomist
Ernst von Dechen, German geologist
Friedrich von Frerichs, German optician
George Romanes, English naturalist
Benjamin Franklin, US scientist
Heinrich Dove, Prussian physicist
John Fothergill, English physician
Richard Pulteney, British botanist
William Cuming, Scottish physician
Jean-Jacques Rousseau, French philosopher
Henri Becquerel, French physicist
George Boole, British mathematician
Ernst von Bergmann, German surgeon
Albrecht Wilhelm Roth, German botanist
J. Wickersheimer, German chemist
Robert Brown, Scottish botanist
Elie de Beaumont, French geologist
John Hunter, Scottish surgeon
Max Planck, caricature
Comte de Buffon, French naturalist
Heinrich Hertz, German physicist
Georg Ohm, German physicist
Sallust, Roman historian
Athanasius Kircher, German Jesuit scholar
Ferdinand von Hebra, Austrian physician
Aristotle, Ancient Greek philosopher
Albert Einstein, Swiss-German physicist
James Edward Smith, British botanist
Johann Zimmermann, Swiss naturalist
Charles Darwin, caricature
Alexander von Humboldt, German naturalist
Jean-Baptiste Lamarck, French naturalist
Georges Cuvier, French zoologist
Voltaire, French author
Jules Verne, French novelist
Crawford Long, US surgeon
George Forster, German naturalist
John Scott Haldane, caricature
Henry Cavendish, British chemist
Charles Coulomb, French physicist
James Joule, British physicist
Hans Christian Oersted, Danish physicist
Alessandro Volta, Italian physicist
Xavier Marmier, French author, illustration
Seneca the Elder, Roman orator
Emile Flourens, French politician
John Lindley, British botanist
Moliere, French playwright
Dmitri Mendeleev, caricature
James Clerk Maxwell, caricature
Joseph Banks, English naturalist
Thomas Huxley, British naturalist
Charles Darwin, British naturalist
Louis Thenard, French chemist
Joseph Banks, British naturalist
Emil Rossmassler, German biologist
Louis Agassiz, Swiss-US naturalist
Johann Kunckel, German chemist
John Evelyn, English author
Richard Richardson, English botanist
John Lettsome, British entomologist
Alfred Russel Wallace, British naturalist
Hermann von Helmholtz, German physicist
Daniel Dennett, US cognitive scientist
Andre-Marie Ampere, French physicist
Alfred Wegener, German geophysicist
Cicero, Roman philosopher
Agrippa, Roman general
Persius, Roman poet
Edward Kelley, English astrologer
19th Century South American Juri man, illustration
Gilbert Romme, French politician and mathematician
Tswana man, 19th Century illustration
Southeast Asian man, 19th Century illustration
Pope Leo XIII, 19th Century illustration
Claude Adrien Helvetius, French philosopher
Karl Ernst von Baer, Prussian scientist and explorer
19th Century velocipede, artwork
19th Century ladies handcar, artwork
Sir Joseph Banks, English naturalist
Joseph Lister, British surgeon
George Berkeley, Irish philosopher
Robert Watson-Watt, British physicist
Andrew Wiles, British mathematician
Charles de Freycinet, French statesman
Umberto I of Italy, 19th Century illustration
Leopold II, King of Belgium
Thomas Huxley, English biologist
Henry Stanley, Anglo-American explorer
Carl Sagan, US astronomer
John Reeves, British naturalist
Niels Bohr, caricature
Weight of gold, 19th Century engraving
Ernest Rutherford, caricature
William Stukeley, English antiquarian
Rene de Reaumur, French naturalist
Leonhart Fuchs, German botanist
民芸品店主人
Ernst Haekel, German naturalist
Franz Joseph Gall, German physiologist
19th Century washing machine, artwork
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Christiaan Huygens, caricature
Henry Doubleday, British naturalist
Pierre-Paul Riquet, French engineer
Tessie du Motay, French chemist
Franz Gall, German physiologist
Johann Blumenbach, German anthropologist
Mary Walker, US surgeon and feminist
Alan Turing, British mathematician
Constantine I, Roman emperor
Xavier Bichat, French anatomist
19th Century penny-farthing, artwork
Ulisse Aldrovandi, Italian naturalist
Jeremy Bentham, British philosopher
19th Century South American Mayoruna man, illustration
19th Century South American Ticuna man, illustration
19th Century Mandinka women, illustration
Francisco Pizarro, Spanish explorer
1735 Two toed sloth from Albertus Seba
Robert Brown, British botanist
Albrecht Durer, German artist
Lionel Adams, British zoologist
John Bardeen, US physicist
Linus Pauling, US chemist
Karl Popper, Austrian-British philosopher
Conrad Gessner, Swiss naturalist
John Lubbock, British biologist
Joseph Jackson, English typefounder
Carl Linnaeus, Swedish botanist
Frederick William III of Prussia, illustration
Maria Christina, Queen of Spain
William MacGillivray, Scottish naturalist
Gaetano Osculati, Italian naturalist
Gaston Plante, French physicist
Henri de Ruolz, French industrial chemist
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Charles Leigh, English physician
Benjamin Stillingfleet, British botanist
David Attenborough, British naturalist
Richard Owen, British palaeontologist
Stephen Gould, US palaeontologist
Alexander Fleming, caricature
Andreas Vesalius, Belgian anatomist
Patrick Moore, British astronomer
Henry Gorham, British entomologist
Jean-Baptiste Bourgery, French anatomist
Xavier Bichat, French pathologist
Bernard de Jussieu, French botanist
Gaspard Bauhin, Swiss botanist
Jean Fernel, French physician
Elisabeth de Rossel, French geoscientist
Napoleon Bonaparte, French Emperor
Henry Adams, British zoologist
Ferdinand Mueller, Australian botanist
William Henry Harvey, Irish botanist