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  1. Travels Around the World
  2. John Adams, by Gilbert Stuart, c. 1800-15
  3. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  4. Sierra de Velasco - USGS Earth as Art
  5. Alternating Motor - Blue
  6. The Birth of Rostam by Caesarean. Shahnameh. The Book of Kings. 16th c. Persian Art
  7. Pneumonia Strikes like a Man Eating Shark - WPA Poster
  8. Capture and Death of Sitting Bull Lithograph
  9. 'Nurse's Song,' plate 18 from 'Songs of Innocence,' 1789
  10. The Optimist - USGS Earth as Art
  11. History Of Power
  12. Full on view of a Woolly Mammoth
  13. Colorized scanning electron micrograph of filamentous Ebola virus particles
  14. Development of Arabic numerals
  15. Cartilage cells, TEM
  16. Earth
  17. Vintage Civil War print featuring the Battle of Gettysburg
  18. Battle Of Gettysburg, 1863
  19. An Ioway Chief
  20. Vintage Civil War print of a Union Drummer Boy holding a rifle on battlefield
  21. A Garland For May Day 1895 Dedicated To The Workers By Walter Crane
  22. Strength In Numbers
  23. Official White House Portrait Of George H. W. Bush By Herbert Abrams
  24. Wine Grapevine - Botanical Illustration
  25. The Nine Year Siege of Troy
  26. Revolutionary War Plan
  27. P-38 Lightning Technical: Retro Travel Poster
  28. Outback Abstract
  29. Orbits of Earth Crossing Asteroids
  30. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  31. Geometry tools
  32. The vertebral column
  33. Manuscript Of Fifteenth Amendment To The Constitution
  34. Black Hole Singularity Diagram
  35. Conceptual image of DNA
  36. Hello Calculator
  37. Colorized image of HIV-infected H9 T-cell
  38. Portrait of naturalist and geologist Charles Darwin
  39. Comparing Saurischian and Ornithischian Pelvises
  40. Modern Geode IV
  41. Keyboard Keys
  42. General Philip Kearny's fatal charge at the Battle of Chantilly
  43. Tuberculosis, Don't Kiss Me!: Your Kiss of Affection, the Germ of Infection - WPA Poster
  44. Caribbean Luxury - USGS Earth as Art
  45. Paul Charles Morphy (1837-84) engraved by D.J. Pound from a photograph
  46. The Shipwrecked Man and the Sea, illustration from Aesop's Fables
  47. Brooklyn Window #25
  48. Normal knee, X-ray