Persius, Roman poet
Seneca the Elder, Roman orator
Agrippa, Roman general
Sallust, Roman historian
Virgil, Roman poet
Constantine I, Roman emperor
Jules Verne, French novelist
Richard Dawkins, British science writer
Roman library, Late Roman Empire
George Boole, British mathematician
Arthur Schopenhauer, German philosopher
Homer, Ancient Greek poet
Jeremy Bentham, British philosopher
James Joule, British physicist
Joseph Lister, British surgeon
Georg Ohm, German physicist
Cicero, Roman philosopher
Aristotle, Ancient Greek philosopher
Joseph Jackson, English typefounder
Henri Becquerel, French physicist
Colosseum in Rome, artwork
B. F. Skinner, caricature
George Berkeley, Irish philosopher
James Hutton, British geologist
Robert Watson-Watt, British physicist
Andrew Wiles, British mathematician
Roman baths, artwork
Pedanius Dioscorides, Greek physician
Albrecht Wilhelm Roth, German botanist
Max Planck, caricature
Charles Darwin, caricature
John Scott Haldane, caricature
Henry Cavendish, British chemist
Charles Coulomb, French physicist
Heinrich Hertz, German physicist
Hans Christian Oersted, Danish physicist
Alessandro Volta, Italian physicist
Charles Townley, British antiquarian
Matt Ridley, caricature
Alfred Brehm, German zoologist
Jean-Jacques Rousseau, French philosopher
Roman temple, artwork
Roman domus, artwork
Andre-Marie Ampere, French physicist
Patrick Moore, British astronomer
John Logie Baird, caricature
Brian Cox, caricature
Robert Oppenheimer, US physicist
Alfred Wegener, German geophysicist
Carl Jung, caricature
Sappho, Ancient Greek poet
Roman arch construction, artwork
Roman water pump design, artwork
Papyrus scrolls, Ancient Rome
Ernest Rutherford, caricature
Albert Einstein, Swiss-German physicist
Hermann von Helmholtz, German physicist
Archilochus of Paros, Ancient Greek poet
Alfred Tennyson, poet, illustration
Daniel Dennett, US cognitive scientist
John Maynard Smith, caricature
John Bardeen, US physicist
Linus Pauling, US chemist
Karl Popper, Austrian-British philosopher
Celsus, Roman encyclopaedist
Heinrich Schliemann, German archaeologist
Steven Pinker, Canadian psychologist
Henrik Ibsen, Norwegian playwright
Ernst von Bergmann, German surgeon
Dmitri Mendeleev, caricature
James Clerk Maxwell, caricature
Roman bridge building, illustration
Roman stables from Pompeii
Luigi Galvani, Italian anatomist
Pythagoras, Ancient Greek mathematician
Socrates, Ancient Greek philosopher
William Gifford, British poet and editor
Francis Bacon, English philosopher
Galileo Galilei, Italian astronomer
A. van Leeuwenhoek, Dutch microbiologist
Theodosius I, Roman Emperor
Alan Turing, British mathematician
Sigmund Freud, caricature
Marguerite Gardiner, Irish writer
Victor Hugo, French Author, illustration
Edward Kelley, English astrologer
Carl Merck, German naturalist
Adolf Bastian, German ethnologist
Heinrich Barth, German explorer
Christian Ehrenberg, German naturalist
Carl Ritter, German geographer
Louis Stromeyer, German surgeon, artwork
Hermann von Wissmann, German explorer
Friedrich Jahn, German gymnastics teacher
Bernhard von Gudden, German anatomist
Ernst von Dechen, German geologist
Friedrich von Frerichs, German optician
Ferdinand von Hebra, Austrian physician
Hermann Kolbe, German chemist
Wilhelm Foerster, German astronomer
Crawford Long, US surgeon
Alfred Adler, Austrian psychiatrist
Arthur C. Clarke, British futurist
Isaac Asimov, US author and biochemist
Stephen Gould, US palaeontologist
David Hilbert, caricature
Ernst Kummer, caricature
Henri Poincare, caricature
Lord Kelvin, caricature
Centaurs, 19th Century illustration
Boar hunting in Ancient Greece
Cleobulus of Lindos, Greek poet
Niels Bohr, caricature
Joseph Lagrange, caricature
J. J. Thomson, British physicist
Sneyd Davies, English poet
Robert Brown, Scottish botanist
Ptolemy, Ancient Greek astronomer
Christiaan Huygens, caricature
Thomas Sonnet de Courval, French poet
Ancient Greek warrior
John Hunter, Scottish surgeon
Prokop Divis, Czech scientist
Heinrich Dove, Prussian physicist
Samuel Pepys, English diarist
Thomas Carlyle, Scottish writer
Martin Lichtenstein, German physician
Horace's Villa, 19th century
Augustin Cauchy, caricature
Charles Babbage, caricature
Joseph Priestley, caricature
Nikola Tesla, caricature
Lady and unicorn, 15th century
Temple of Peace, Rome, 19th Century illustration
Friedrich von Schelling, German philosopher
Persi Diaconis, US mathematician
John Fothergill, English physician
Richard Pulteney, British botanist
William Cuming, Scottish physician
Roman kiln, artwork
19th Century velocipede, artwork
19th Century ladies handcar, artwork
Moliere, French playwright
1836 satire of social welfare of disabled
Ptolemy, Greek astronomer
Roman augurs and oracle, illustration
Tycho Brahe, caricature
Peach Prunus persica, artwork
Nerium oleander, 19th century
Gymea lily, 19th century
Strobilantes flowers
Clove plant flowers and fruit
Cinnamon flowers and leaves
Osbeckia chinensis flowers
Cucumber tree fruits
Malay apple flowers and fruit
Purple gentian flowers
Nutmeg fruits and seeds
Malabar arrowroot flowers and rhizome
Black pepper growing on the vine
Green tea flowers and fruits
East Indian Klugia flowers
Tobacco flowers
Cashew plant fruit and nuts
Water lily (Nymphaea ampla), artwork
Edmondia sesamoides, artwork
Capillipedium parviflorum, artwork
Alga (Ulva lingulata), artwork
Alga (Ulva pavonia), artwork
Kelp (Fucus agarum), artwork
Kelp (Fucus radiatus), artwork
Kelp (Fucus bulbosus), artwork
Kelp (Fucus digitatus), artwork
Kelp (Fucus crispus), artwork
Kelp (Fucus saccatus), artwork
Albert Einstein, caricature
Gods on Mount Olympus, 19th Century illustration
Asclepius and Hygieia, ancient Greek god and goddess
Georges Cuvier, French zoologist
Louis Pasteur, French microbiologist
Caricature of a Man with Bushy Hair, 1495
Arum dioscoridis, 19th century
Digitalis viridiflora, 19th century
Rock orchid flowers
Wild hibiscus flowers
Rhododendron flowers
Rice stalks and flowers
Red hot poker (Norantea guianensis) plant
Water lily (Nymphaea capensis), artwork
Rhododendron flowers, artwork
19th Century washing machine, artwork