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  1. O Is For Owl
  2. General George Patton during a ticker tape parade
  3. Vintage World War II poster
  4. Anterior view and sagittal view of male urinary bladder
  5. Male skeleton, computer artwork.
  6. Vintage World War II poster featuring a red, white, and blue shiel
  7. Triceratops
  8. World War I, Map, c1919
  9. x-ray of head
  10. Proclamation by English colonial Governor Bellomont, 1698
  11. Cardiovascular scan
  12. Every Child Deserves A Great School
  13. Blue Gemstones Found Near Jodhpur
  14. Taming of the West: The Way of the Law
  15. Allosaurus
  16. Born to be a Teacher
  17. Pachycephalosaurus
  18. Frogs and their Eggs
  19. Velociraptor
  20. President Kennedy greets Peace Corps Volunteers on the White House South Lawn
  21. Definition of anthropology
  22. Conceptual image of chromosome
  23. Brachiosaurus
  24. 'London', plate 38 from 'Songs of Experience', 1794
  25. Mission Santa Ynez or Ines, Solvang, California
  26. That Dam Cloud
  27. Ida B. Wells, 1891
  28. The Man and the Alembic
  29. Joachim Murat Reviews a Company of Black Soldiers in Koenigsberg
  30. Comet of 1811, 19th century artwork
  31. Conceptual image of human lungs and rib cage
  32. Ceratosaurus
  33. Humpty Dumpty
  34. Waziristan Hills - USGS Earth as Art
  35. California - USGS State Mosaic
  36. Apatosaurus
  37. Battle of Waterloo, June 18, 1815, 3rd Grenadier of Guard commanded by Cambronne
  38. Mankind in the Making
  39. Abstract Alphabet
  40. ABCs
  41. Body Plans of Extinct Reptiles
  42. Euoplocephalus
  43. Artist's concept depicting the evolution of a lobe-finned fish to an amphibian
  44. Science classroom
  45. School Days
  46. Chalkboard with greetings written in English, French and German
  47. Lifecycle of a Frog
  48. A Black Soldier In the Union Army Leading A Supply Train, 1864