Cats Decorating Christmas Tree 1906
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Death Of Harold, Bayeux Tapestry
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Boulevard Du Temple, By Daguerre, 1838
Science Source
Hypatia Of Alexandria, Mathematician #2
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Declaration Committee 1776
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United States Constitution #1
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Adelie Penguins
Art Wolfe
Launching The James Caird, 1916
Science Source
Phillis Wheatley
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Chinese Physician Taking Radial Pulse
Wellcome Images
Statue of Liberty Being Renovated
Jan Lukas and Photo Researchers
Paleozoic Flora, Calamites, Illustration
British Library
Emperor Penguin Chicks #1
Jean-Louis Klein and Marie-Luce Hubert
Wilbur Wright Pilots Early Glider 1901
Science Source
M65 Atomic Cannon
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Gregor Mendel, Father Of Genetics #3
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Page Of The Gutenberg Bible, 1455 #1
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Anesthesiology
Brooks Brown
Mark Twain
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Sojourner Truth, African-american
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Lincoln Reading To His Son
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Gare Montparnasse Train Wreck 1895
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Vishnu And Lakshmi #1
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Bowermans Waffle Sole Design
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Ny Times, Sinking Of The Titanic, 1912
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Miniature Long-haired Dachshunds #6
John Daniels
Charles R. Drew #1
Science Source
Agnodice, Ancient Greek Physician, 4th #2
Wellcome Images
Neuron, Tem
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Fingerprint Patterns
Photo Researchers
Fingerprint Patterns #1
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H.m.s. Beagle
Science Source
Anatomy Of The Spine
Science Source
Neuron, Tem #2
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Alchemy Symbols
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High Bridge, New York, 19th Century
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Bulldog Puppies
Mark Taylor
Camarasaurus Tail Bone
Ted Kinsman
Union Membership Card, 1886
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Bulldog Pup #7
Mark Taylor
A Christmas Catastrophe 1906
Photo Researchers
Charles R. Drew
Science Source
Laysan Albatross Chick #5
M Watson
Postman In Tuxedo Delivering Letter
Ikon Images
Aeschylus, Greek Tragedian #1
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Aristotle, Ancient Greek Philosopher
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Mithras Slaying The Great Bull #1
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Baruch Spinoza, Jewish-dutch Philosopher
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Ludwig Boltzmann, Austrian Physicist #1
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Phillis Wheatley, African-american Poet #4
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Chevreuls Chromatic Circle
Getty Research Institute
Eugen Sandow, Father Of Modern
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Tasmanian Tiger, Extinct Species
Biodiversity Heritage Library
Kittens Asleep On Shoes
Jean-Michel Labat
Harriet Tubman With Husband And Daughter
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Polluted Water Spreading Disease #1
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Native American Man In Painted Robe
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Raphus Cucullatus, Extinct Dodo Bird
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Utopian Flying Machines 19th Century
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Battle Of Nevilles Cross 1346
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Blue Grosbeak And Sweet Flowering Bay
Wellcome Images
Shackletons Endurance Trapped In Pack #3
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John Harrisons First Sea Clock
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Cervical Plug
Science Source
E. Lillian Todd
Science Source
Pap Smear Cancer #3
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John Hopkins Operating Room, 19031904
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Chest X-ray - Copd And Scoliosis
Medical Body Scans