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  1. Alexander Mackenzie (1764-1820)
  2. Toad of Toad Hall
  3. Io I
  4. American History print of President George Washington and his family
  5. The Discovery Of Nat Turner
  6. Colorized scanning electron micrograph of filamentous Ebola virus particles
  7. Meandering Mississippi - USGS Earth as Art
  8. The sun sets behind a row of spinning windmills or wind turbines
  9. Beyond Our Solar System V
  10. Map of Armenia, Colchis, Iberia and Albania
  11. The Sun I
  12. United States Fun Facts
  13. Anterior neck and facial muscles of the human head (with labels)
  14. Solar System - Brown
  15. Pinned broken leg, X-ray
  16. Abraham Lincoln
  17. Printing Press
  18. Boxing
  19. Upper body bones, computer artwork.
  20. Wire Frame Render of a Clock Mechanism, Close-up
  21. Neanderthals hunt a cave bear
  22. The Sun
  23. Internal view of the human heart
  24. Titan II
  25. The musculoskeletal system
  26. Portrait of Patrick Henry (1736-99)
  27. Abraham Lincoln Portrait, 1863
  28. Mushroom Chart III
  29. General George Patton during a ticker tape parade
  30. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  31. Alaska - USGS State Mosaic
  32. Lumbar vertebra
  33. The Syrian Desert - USGS Earth as Art
  34. Officers of 4th New Jersey Infantry, American Civil War
  35. Houdini Diver Suit
  36. First Letter Carried By Pony Express
  37. Mark Twain , 1901
  38. The Sun III
  39. Apollo 13
  40. The bones of the neck
  41. Cartilage cells, TEM
  42. Cross section biomedical illustration of pulp and root abscess in molar
  43. Every Child Deserves A Great School
  44. Spruce Goose - Hughes H-4 Hercules Blueprint: Retro Travel Poster
  45. Spirit And Opportunity, Mars Exploration Rover Project
  46. Presidential portrait of Jimmy Carter
  47. Skeleton Chart
  48. Linguistics table, 17th century