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  1. Brain, artwork
  2. Rhodochrosite Mineral From China's Wuton Mine
  3. A diagram showing the phases of the Earths moon
  4. Portrait Of Harriet Tubman, 1870
  5. Vintage Civil War print of the Battle of Gettysburg
  6. Remington, Cowboys, 1888
  7. Let Freedom Ring I
  8. Constitution of the united states of america
  9. Solar System - Minimal
  10. Tribute To Vikings
  11. Portrait of Chief Red Cloud in headdress
  12. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  13. The Doctrine of Monroe
  14. Earth Agate F
  15. Buffalo Hunt, 1830S
  16. Old Brass', a native North American, 19th century
  17. Plum Agate B
  18. Mathematical Elements I
  19. World War II: Headline, 1941
  20. Lincoln's Gettysburg Address
  21. Solar system
  22. The Hare and the Tortoise, illustration from Aesop's Fables
  23. Wild West
  24. Benjamin Franklin's face on the Hundred Dollar Bill
  25. Agate Studies III
  26. Portrait Of John Brown
  27. Saturn
  28. Ford Engine
  29. John Coltrane Playing The Soprano Saxophone, 1960's
  30. Light Bulb
  31. The First Reading of the Emancipation Proclamation Before the Cabinet
  32. Paul Revere By John Singleton Copley
  33. Let Freedom Ring II
  34. Obama: Believe
  35. Composite of 90 different species of parrots
  36. Attorney And Client, Fortitude And Impatience. Illustration From The Book Bleak House
  37. Horse Chestnut - Botanical Illustration
  38. Multiphoton fluorescence image of HeLa cells
  39. The Round-Up, 1888
  40. The lumbar vertebrae
  41. Apple Tree - Botanical Illustration
  42. Civil War painting of Union and Confederate troops fighting at The Battle of Bull Run
  43. Martin Luther King, Jr. (1929-1968)
  44. Math Formulas On Chalkboard
  45. Jupiter
  46. Be Whoo You Are
  47. Electric Coloured Sky
  48. Ra