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  1. Neutral Periodic Table
  2. Davy Crockett: Hero of the Alamo
  3. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper stone
  4. Neon Periodic Table
  5. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  6. Notorious RBG
  7. Prague Astronomical Clock
  8. Strong Force
  9. Civil War painting of Union and Confederate troops at The Battle of Shiloh
  10. Vintage Civil War print of the Battle of Franklin
  11. Prohibition Headline, 1919
  12. Meat For the Tribe, 1891
  13. Explorers Wanted on the Journey to Mars
  14. Bruce McCandless floating free from spacecraft in orbit, 1984
  15. Religious Book Week, Good Books Build Character
  16. Interior of the Library, Trinity College, Dublin, Eire (Republic of Ireland)
  17. Anterior view of human skeletal system, with labels
  18. The Capitol -East Front
  19. Old Books on a Shelf
  20. Solar System - Old
  21. Hudson Bay Trading Post On Flathead Indian Reservation, Montana Territory, c1860
  22. Weak Force
  23. Abraham Lincoln, by George Peter Alexander Healy, 1860
  24. World War II: Headline, 1941
  25. Oilfield At Spindletop
  26. Four kinds of lamp: Edison, Maxim, Swan, and Werdermann
  27. Development of the English alphabet
  28. Apache On Horseback, c1903
  29. George Washington, by Gilbert Stuart, c. 1803-05
  30. Scanning electron micrograph of a human T cell
  31. Deschutes Jasper, Oregon
  32. Grey Agate E
  33. Sinking Of The Titanic By Willy Stoewer
  34. Chalkboard Periodic Table
  35. Normal neck, X-ray
  36. Andrew Jackson, by Thomas Sully, 1845
  37. The Hare Afraid by His Ears, La Fontaine's Fables
  38. Einstein
  39. Coral Reef
  40. Multi-Life
  41. Zig Zag Pattern Crazy Lace Agate
  42. The Reading Room on board the Titanic, 1912
  43. The Tea Party
  44. Benjamin Franklin, 1782
  45. Underground Railroad Map
  46. Pharoahs of Egypt
  47. Eye
  48. Vintage Civil War print of the Battle of Cold Harbor