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  1. Stethoscope
  2. Stacked Agate I
  3. Arthritis of the knee, X-ray
  4. Famous prehistoric rock paintings of Tassili N'Ajjer, Algeria
  5. Stacked Agate II
  6. Vintage Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  7. Colon blood vessels, light micrograph
  8. South American Independence
  9. Mushroom Chart I light
  10. Apache Men, c1906
  11. A composite showing different stages of the 2010 solstice total moon eclipse
  12. Austenaco, Great Warrior, Commander in Chief of the Cherokee Nation
  13. Flatboat, 19th Century
  14. Spatial dimensions, conceptual artwork
  15. Photograph of logarithmic slide rule
  16. Ball Play Of the Choctaw, 1840s
  17. Watercolor Agate I
  18. Agate Studies IV
  19. Indigo Agate C
  20. Portrait Of Harriet Tubman, 1868-69
  21. Map Of the Battle Of Gettysburg, 1863
  22. The Planets, excluding Pluto
  23. General Curtis LeMay and President Kennedy
  24. Superior view of human brain with colored lobes and labels
  25. Blackfoot Native American
  26. The Quack Frog, illustration from Aesop's Fables
  27. Agate Geode I
  28. Living Relatives of Dinoaurs
  29. The Rainforest
  30. Solar System (Colored)
  31. Study of the Human Figure, Lateral View
  32. Moss Agate
  33. Titanic survivors in lifeboat
  34. Vitruvian Skeleton
  35. Frank Whittle's early development of the jet engine
  36. The Sinking of the Laconia in 1942
  37. Mars
  38. A Mad Teaparty By Charles Folkard
  39. Bright Periodic Table - White, Modern Text
  40. In With the Horse Herd
  41. Houdini Diver Suit
  42. Desk Tools I
  43. Decorative Lintel from the ancient Mayan city of Yaxchilan, Chiapas, Mexico
  44. The bones of the jaw
  45. Molecule THC
  46. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  47. Von Karman Vortices - USGS Earth as Art
  48. Sohrab Facing the Tent of the Persian Army Leaders. Shahnameh. The Book of Kings. 16th c