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  1. Pipestone Quarry On the Coteau Des Prairies, 1836
  2. Cartilage cells, TEM
  3. United States Fun Facts
  4. Portrait of Booker T. Washington sitting in a chair
  5. The Making of America
  6. The sun sets behind a row of spinning windmills or wind turbines
  7. A Garland For May Day 1895 Dedicated To The Workers By Walter Crane
  8. Battle Of Gettysburg, 1863
  9. Behemoth and Leviathan
  10. European Travel
  11. Vintage Civil War print of a Union Drummer Boy holding a rifle on battlefield
  12. The four terrestrial planets compared in scale
  13. Front page of The New York Times, 13 February 1945, reporting on the Yalta Conference
  14. Cross section image of human head
  15. An Ioway Chief
  16. Development of Arabic numerals
  17. Elastic artery cross-section, SEM
  18. Montana - USGS State Mosaic
  19. The First Public Reading of the Declaration of Independence
  20. Wine Grapevine - Botanical Illustration
  21. Official White House Portrait Of George H. W. Bush By Herbert Abrams
  22. A Pawnee Brave
  23. Battle of Eylau, Napoleon orders Murat to Charge Russian Army
  24. Spilled Paint - USGS Earth as Art
  25. Tennessee - USGS State Mosaic
  26. Abraham Lincoln (1809-65) plans his campaign during the American Civil War (1861-65)
  27. Manuscript Of Fifteenth Amendment To The Constitution
  28. Death's Door, illustration from 'The Grave, A Poem'
  29. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  30. Revolutionary War Plan
  31. The Nine Year Siege of Troy
  32. Outback Abstract
  33. Oscar Wilde
  34. Teach on Mars and its Moons
  35. Geometry tools
  36. Black Hole Singularity Diagram
  37. Portrait of naturalist and geologist Charles Darwin
  38. Laboratory Equipments
  39. Long Island Railroad Communication Lines
  40. Technicians Wanted to Engineer our Future on Mars
  41. Conceptual image of DNA
  42. Meandering Mississippi - USGS Earth as Art
  43. The Flying Dutchman And Voltigeur Running The Great Match At York Racecourse
  44. P-38 Lightning Technical: Retro Travel Poster
  45. Comparing Saurischian and Ornithischian Pelvises
  46. Keyboard Keys
  47. Moses and the Burning Bush
  48. Invertebrates