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  1. x-ray of head
  2. Harriet Tubman II
  3. Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  4. Battle Of Mobile Bay, 1864
  5. New Mexico - USGS State Mosaic
  6. Solar System (Minimal)
  7. Teacher Truths black I-Successful Students
  8. Little Boy Blue, from Old Mother Goose's Rhymes and Tales
  9. Behemoth and Leviathan
  10. Girl looking over stack of books
  11. A simplified Herzprung Russell Diagram showing how stars are classified
  12. Knights of the Round Table
  13. Revolutionary War Plan
  14. Northern Norway - USGS Earth as Art
  15. Man using laptop computer
  16. Puerto Rico - USGS State Mosaic
  17. Oscar Wilde, 1854 - 1900, Irish Poet And Playwright
  18. The Swedish Warship Vasa
  19. Scene From Little Red Riding Hood By Charles Perrault, 1880
  20. Portrait of Booker T. Washington sitting in a chair
  21. North Carolina - USGS State Mosaic
  22. The Making of America: 'Hear Me, My Chiefs'
  23. Timberman
  24. Global map of Saturns moon Dione
  25. Signature Of Charles Dickens, 1812-1870. From The Book Bleak House
  26. Mushroom Chart II
  27. Normal spine, X-ray
  28. Oregon. Close-up of Owyhee Picture Jasper stone
  29. Heather - Botanical Illustration
  30. A Relative
  31. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  32. Rice Terraces, Longsheng Ping'an, Guangxi
  33. Terracotta Warriors
  34. Vintage Civil War Print of General Ulysses S. Grant
  35. The musculoskeleton of the neck
  36. Conceptual image of DNA
  37. Vintage Parchment Edison Light Bulb Poster
  38. Barreal Blanco - USGS Earth as Art
  39. Portrait of naturalist and geologist Charles Darwin
  40. Detached blood clot, artwork
  41. The Titanic's propeller in the Thompson Graving Dock of Harland
  42. Bears
  43. Carte De Visite Of Edmonia Lewis, 1870
  44. The Rosetta Stone
  45. The Rape of Europa
  46. Wire Frame Render of a Clock Mechanism
  47. San Luis, Argentina - USGS Earth as Art
  48. World War I, Map, c1918