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  1. As Pandora Raised The Lid The Cottage Grew Very Dark. Illustration
  2. Lion and Gladiator
  3. Print of folk hero and frontiersman Davy Crockett
  4. The arteries of the brain
  5. Christian's Conflict With Apollyon. From The Book The Pilgrim's Progress
  6. Science classroom
  7. A Garland For May Day 1895 Dedicated To The Workers By Walter Crane
  8. Alberta, Reserve, c1890
  9. Sierra de Velasco - USGS Earth as Art
  10. Ambassador George Bush
  11. The Renaissance
  12. Military camp with soldiers in street during the American Civil War
  13. Smilodon sabertooth mother and her cubs
  14. Human skeleton
  15. x-ray of head
  16. Southern Star Chart
  17. Antique French Grape Press
  18. A herd of Brachiosaurus travel near a canyon mountain
  19. Color Field
  20. Relief depiction of Ramses II, Temple of Luxor, Egypt
  21. Impact - USGS Earth as Art
  22. Pneumonia Strikes like a Man Eating Shark - WPA Poster
  23. Old Mother Hubbard, from Old Mother Goose's Rhymes and Tales
  24. Human brain anatomy, lateral view
  25. Utah - USGS State Mosaic
  26. The Los Angeles Times announcing the end of World War I, 1918
  27. Conversion
  28. Colorized scanning electron micrograph of filamentous Ebola virus particles
  29. Technicians Wanted to Engineer our Future on Mars
  30. Nelson Mandela
  31. Andes - USGS Earth as Art
  32. Female human head with brain
  33. Definition of anthropology
  34. Portrait of naturalist and geologist Charles Darwin
  35. The bones of the foot
  36. Bogda Mountains - USGS Earth as Art
  37. Magic Money
  38. The cervical vertebrae
  39. General Curtis LeMay and President Kennedy
  40. Conceptual image of plasmodium causing malaria
  41. Neanderthals hunt a cave bear
  42. Marco Polo
  43. Deinonychus
  44. Virginia - USGS State Mosaic
  45. Map Of France, C.1900
  46. Samuel Langhorne Clemens, 1835
  47. Anterior view and sagittal view of female urinary bladder
  48. Scanning electron micrograph of just-divided HeLa cells