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  1. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper stone
  2. External anatomy of the human eye (with labels)
  3. Emperor Napoleon in His Study at the Tuileries, by Jacques-Louis David, 1812
  4. Meat For the Tribe, 1891
  5. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  6. Civil War painting of Union and Confederate troops at The Battle of Shiloh
  7. Prohibition Headline, 1919
  8. Notorious RBG
  9. Strong Force
  10. Vintage Civil War print of the Battle of Franklin
  11. Prague Astronomical Clock
  12. The Capitol -East Front
  13. Solar System - Old
  14. Davy Crockett: Hero of the Alamo
  15. Four kinds of lamp: Edison, Maxim, Swan, and Werdermann
  16. Explorers Wanted on the Journey to Mars
  17. Hudson Bay Trading Post On Flathead Indian Reservation, Montana Territory, c1860
  18. Bruce McCandless floating free from spacecraft in orbit, 1984
  19. Anterior view of human skeletal system, with labels
  20. Religious Book Week, Good Books Build Character
  21. Development of the English alphabet
  22. Chalkboard Periodic Table
  23. Apache On Horseback, c1903
  24. Interior of the Library, Trinity College, Dublin, Eire (Republic of Ireland)
  25. Weak Force
  26. Scanning electron micrograph of a human T cell
  27. Oilfield At Spindletop
  28. Abraham Lincoln, by George Peter Alexander Healy, 1860
  29. Coral Reef
  30. World War II: Headline, 1941
  31. Andrew Jackson, by Thomas Sully, 1845
  32. Grey Agate E
  33. George Washington, by Gilbert Stuart, c. 1803-05
  34. Signature of George Washington
  35. Sinking Of The Titanic By Willy Stoewer
  36. The Hare Afraid by His Ears, La Fontaine's Fables
  37. Love to Read
  38. The Reading Room on board the Titanic, 1912
  39. Einstein
  40. The Tea Party
  41. Obama: Change
  42. Zig Zag Pattern Crazy Lace Agate
  43. Pharoahs of Egypt
  44. Underground Railroad Map
  45. Old Books on a Shelf
  46. Multi-Life
  47. Eye
  48. Timeline of Animals