Agrippa, Roman general
Persius, Roman poet
Seneca the Elder, Roman orator
Sallust, Roman historian
Constantine I, Roman emperor
Virgil, Roman poet
Aristotle, Ancient Greek philosopher
Joseph Jackson, English typefounder
Pedanius Dioscorides, Greek physician
Charles Townley, British antiquarian
Mary Walker, US surgeon and feminist
Colosseum in Rome, artwork
Roman baths, artwork
Robert Oppenheimer, US physicist
Homer, Ancient Greek poet
Roman library, Late Roman Empire
Cicero, Roman philosopher
Henri Becquerel, French physicist
George Boole, British mathematician
Arthur Schopenhauer, German philosopher
Jules Verne, French novelist
Celsus, Roman encyclopaedist
Roman temple, artwork
Roman domus, artwork
Crawford Long, US surgeon
Heinrich Schliemann, German archaeologist
Max Planck, caricature
Charles Darwin, caricature
John Scott Haldane, caricature
Jeremy Bentham, British philosopher
Henry Cavendish, British chemist
Charles Coulomb, French physicist
Heinrich Hertz, German physicist
James Joule, British physicist
Joseph Lister, British surgeon
Hans Christian Oersted, Danish physicist
Georg Ohm, German physicist
Alessandro Volta, Italian physicist
Albert Einstein, Swiss-German physicist
Roman stables from Pompeii
John Bardeen, US physicist
Linus Pauling, US chemist
Roman arch construction, artwork
Roman water pump design, artwork
Ernst von Bergmann, German surgeon
Albrecht Wilhelm Roth, German botanist
Alan Turing, British mathematician
Andre-Marie Ampere, French physicist
Edward Kelley, English astrologer
Alfred Brehm, German zoologist
Jean-Jacques Rousseau, French philosopher
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
John Logie Baird, caricature
Brian Cox, caricature
George Berkeley, Irish philosopher
Richard Dawkins, British science writer
James Hutton, British geologist
Robert Watson-Watt, British physicist
Alfred Wegener, German geophysicist
Andrew Wiles, British mathematician
19th C Druze, illustration
B. F. Skinner, caricature
Theodosius I, Roman Emperor
Boar hunting in Ancient Greece
Roman bridge building, illustration
Horace's Villa, 19th century
Robert Brown, Scottish botanist
Papyrus scrolls, Ancient Rome
Temple of Peace, Rome, 19th Century illustration
Archilochus of Paros, Ancient Greek poet
Sappho, Ancient Greek poet
Roman kiln, artwork
Sale of slaves in the USA, 1860s
John Hunter, Scottish surgeon
Prokop Divis, Czech scientist
Heinrich Dove, Prussian physicist
Martin Lichtenstein, German physician
Roman augurs and oracle, illustration
Ernest Rutherford, caricature
Hermann von Helmholtz, German physicist
Ancient Greek warrior
Ptolemy, Greek astronomer
Centaurs, 19th Century illustration
Daniel Dennett, US cognitive scientist
John Maynard Smith, caricature
Karl Popper, Austrian-British philosopher
John Fothergill, English physician
Richard Pulteney, British botanist
William Cuming, Scottish physician
19th Century velocipede, artwork
19th Century ladies handcar, artwork
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
Socrates, Ancient Greek philosopher
Hercules and the Cercopes, 5th century BC sculpture
Naval battle organised by Emperor Claudius, illustration
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
Dmitri Mendeleev, caricature
James Clerk Maxwell, caricature
Tacitus, Roman senator and historian
Luigi Galvani, Italian anatomist
Historical flag of the United States of America
Death of Laocoon, illustration
Pythagoras, Ancient Greek mathematician
Coconut
19th Century penny-farthing, artwork
Ancient Greek athletes running, illustration
Mycenaean warrior, illustration
Matt Ridley, caricature
Francis Bacon, English philosopher
Galileo Galilei, Italian astronomer
A. van Leeuwenhoek, Dutch microbiologist
William Cullen, Scottish physician
Carl Jung, caricature
Sigmund Freud, caricature
Arch of Titus, Rome, illustration
Plato, Ancient Greek philosopher
Chester Alan Arthur, 21st President of the USA
Roman dancers from Pompeii
Pliny the Elder, Roman naturalist, illustration
Ancient Assyrian bas relief, illustration
Hermes sculpture of Praxiteles.
Lily and orchid flowers
Neem flowers and fruits
Coffee plant and beans
Silk cotton flowers and boll
Calogyne corrugata flowers
Indian rosebay flowers
David Hilbert, caricature
Ernst Kummer, caricature
Henri Poincare, caricature
Lord Kelvin, caricature
Pharaoh Amenhotep I, 1888 artwork
Croesus on the stake, historical artwork
Delaware state flag
Watt's steam engine, historical artwork
John Lindley, British botanist
Ancient Egyptian scribe working, illustration
Custard apple fruit
Gooseberry flowers and fruits
Chilli pepper
Nankeen cotton flowers and boll
Rattan palm fruits