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  1. David Copperfield. Illustration for the Charles Dickens novel David Copperfield
  2. Molecule Testosterone
  3. Oregon. Close-up of Owyhee Picture Jasper stone
  4. Cingulate gyrus in the brain, artwork
  5. Wright Flyer sculpture at Wright Brothers National Memorial, North Carolina
  6. Mt. Etna - USGS Earth as Art
  7. Ambassador George Bush
  8. Molecule Estrogene
  9. Boxing
  10. San Luis, Argentina - USGS Earth as Art
  11. Oregon - USGS State Mosaic
  12. Conceptual image of platelet, red blood cell and white blood cell
  13. Illustration of strip of land known as the 'fertile crescent'
  14. Internal view of the human heart
  15. Rocky Mountains - USGS Earth as Art
  16. Terracotta Army
  17. Vintage Civil War Print of General Ulysses S. Grant
  18. Roof of the World - USGS Earth as Art
  19. Neanderthals hunt a cave bear
  20. Harriet Tubman, 1911
  21. Relief depiction of Ramses II, Temple of Luxor, Egypt
  22. Map of Palestine, Palestina Antiqua
  23. Male skeleton, computer artwork.
  24. Alice and the White Knight, from 'Alice in Wonderland' by Lewis Carroll
  25. Peter and the Mermaids
  26. Blood clot, SEM
  27. Marie Curie
  28. Book Cover of 'Jeanne d'Arc'
  29. World War I, Map, c1918
  30. Ida B. Wells
  31. Tyrannosaurus
  32. old-fashioned drawing compass
  33. Sigmund Freud
  34. Dice on math game
  35. Lovecraft
  36. Deinonychus
  37. Antique French Grape Press
  38. Gold Leaf Agate
  39. Anterior view of human skull, with labels
  40. Alaska - USGS State Mosaic
  41. Anterior neck and facial muscles of the human head (with labels)
  42. Solar System - Brown
  43. Barreal Blanco - USGS Earth as Art
  44. Portrait of General William Tecumseh Sherman (1820-91)
  45. Map Of France, C.1900
  46. Yellowstone
  47. Be Creative
  48. Knights of the Round Table