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  1. Columbus, Map, 15th Century
  2. Prohibition Cartoon, 1920s
  3. Plan Of the Campaign In New York And New Jersey, 1776
  4. The nerve supply of the trunk
  5. Mars
  6. Human digestive system, with labels
  7. Grammar Lesson
  8. Rice Terraces, Longsheng Ping'an, Guangxi
  9. Molecule Milk
  10. How Seeds Travel
  11. Nikola Tesla With An Early Tesla Coil
  12. Portrait Of Ida B. Wells Barnett, 1893
  13. Taking Off..., illustration from 'Wings Across the World', 1978
  14. The Moon
  15. Alexander Mackenzie (1764-1820)
  16. Wheat Mower with Hat, Seen from Behind, by Vincent van Gogh, c. 1870-90
  17. Paisley Agate
  18. Oregon. Close-up of Graveyard Point Plume Agate stone
  19. Costellazioni II
  20. Desk Tools II
  21. The Summit Of Little Round Top During the Battle Of Gettysburg, 1863
  22. The Rape of Europa
  23. Poppy Jasper
  24. Men in Armour IV
  25. Mushroom Chart III
  26. Parana River Delta - USGS Earth as Art
  27. American History print of President Washington and Lincoln
  28. The Best Teachers
  29. Science classroom
  30. Fagin in the Condemned Cell. Illustration for the novel Oliver Twist
  31. The Summer Road
  32. Astronomical Chart I
  33. Utah - USGS State Mosaic
  34. Alice and The Cheshire Cat
  35. Oregon, Owyhee. Close-up of picture jasper stone
  36. Miss Havisham. Illustration for the Charles Dickens novel Great Expectations 1910
  37. Sagenite On Mexican Agate
  38. Conceptual image of neuron
  39. Blues Guitarist And Singer Rosetta Tharpe Playing Steel Guitar
  40. Siberian Ribbons - USGS Earth as Art
  41. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  42. Magic Money
  43. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  44. Portrait of Ulysses S. Grant (1822-85)
  45. Interiors of a library, Peabody Institute, Johns Hopkins University, Baltimore, Maryland
  46. The Tea Party II
  47. Andes - USGS Earth as Art
  48. Andalgalornis steulleti, a flightless predatory bird