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  1. Stethoscope
  2. American War of Independence
  3. Pietersite
  4. Colon blood vessels, light micrograph
  5. Arthritis of the knee, X-ray
  6. A composite showing different stages of the 2010 solstice total moon eclipse
  7. Antique Stock Certificate IV
  8. Apache Men, c1906
  9. Photograph of logarithmic slide rule
  10. Indigo Agate C
  11. South American Independence
  12. Ball Play Of the Choctaw, 1840s
  13. General Curtis LeMay and President Kennedy
  14. Spatial dimensions, conceptual artwork
  15. Space Suit
  16. Vintage American Civil War print of The Battle of Cherbourg
  17. The Quack Frog, illustration from Aesop's Fables
  18. Austenaco, Great Warrior, Commander in Chief of the Cherokee Nation
  19. Watercolor Agate I
  20. Stacked Agate I
  21. Study of the Human Figure, Lateral View
  22. Agate Geode I
  23. Famous prehistoric rock paintings of Tassili N'Ajjer, Algeria
  24. Agate Studies IV
  25. Solar System (Colored)
  26. Stacked Agate II
  27. Earth Agate E
  28. The Planets, excluding Pluto
  29. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  30. Flatboat, 19th Century
  31. The Rainforest
  32. Frank Whittle's early development of the jet engine
  33. Living Relatives of Dinoaurs
  34. Titanic survivors in lifeboat
  35. Houdini Diver Suit
  36. Mars
  37. Decorative Lintel from the ancient Mayan city of Yaxchilan, Chiapas, Mexico
  38. Superior view of human brain with colored lobes and labels
  39. Vitruvian Skeleton
  40. Moss Agate
  41. Desk Tools I
  42. Von Karman Vortices - USGS Earth as Art
  43. Purple Watercolor Agate I
  44. Book
  45. Sohrab Facing the Tent of the Persian Army Leaders. Shahnameh. The Book of Kings. 16th c
  46. The bones of the jaw
  47. Pi to 2198 decimal place
  48. Molecule Vanilin