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  1. The Transfiguration
  2. Volcanoes - USGS Earth as Art
  3. Dragon Lake - USGS Earth as Art
  4. The cervical vertebrae
  5. The Los Angeles Times announcing the end of World War I, 1918
  6. Get Ahead! Adult Education Classes: For Adults at No Charge - WPA Poster
  7. Scottish regiment fighting German troops at Battle of Loos
  8. Venus
  9. Desert Patterns - USGS Earth as Art
  10. Assembly Required to Build Our Future on Mars and its Moons
  11. Conceptual image of DNA
  12. Lion and Gladiator
  13. Military camp with soldiers in street during the American Civil War
  14. The building of the Union Pacific Railroad
  15. Che Guevara
  16. Miss Nightingale in the Hospital at Scutari
  17. Cardiovascular system, artwork
  18. Fun Facts about the U.S. Presidents
  19. Silversmith at work, c.1914
  20. Geometry set
  21. The musculoskeleton of the jaw
  22. Beer, the Hop Plant, 1836
  23. Mae Jemison (1956- )
  24. Archaeopteryx
  25. Annunciation to the Shepherds. Book of Hours of Leonor de la Vega. 1465-70
  26. Vertebrates
  27. Blue Watercolor Agate Square
  28. Lady Bell Plant Pollen
  29. Vintage Civil War poster of the Battle of Missionary Ridge
  30. General Robert E. Lee at the Battle of Fredericksburg, 13th December 1862
  31. Golden Pharoah
  32. The Flying Dutchman And Voltigeur Running The Great Match At York Racecourse
  33. Invertebrates
  34. Conceptual image of platelets with red blood cells
  35. Bright Periodic Table - Black, Modern Text
  36. Okavango Delta - USGS Earth as Art
  37. The Fox and the Crow, Selected Fontaine's Fables
  38. Civil War, Bull Run, 1861
  39. The nerve supply of the upper body
  40. Alice And The Caterpillar
  41. Abraham Lincoln (1809-65) plans his campaign during the American Civil War (1861-65)
  42. Ganges River Delta - USGS Earth as Art
  43. Vintage American History print of Colonel Theodore Roosevelt
  44. Dandy Bones
  45. Colours That Reflect Joy
  46. World War I, Geography
  47. Yutyrannus huali is a feathered tyrannosauroid from the Early Cretacous of China
  48. American History print of Benjamin Franklin's reception by the French court