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  1. Mushroom Chart II
  2. Alice And The Caterpillar
  3. Ratcliffe Power Station
  4. Native Peruvian Dancer And Dress
  5. Alabama - USGS State Mosaic
  6. Bright Periodic Table - White, Classic Text
  7. Andalgalornis steulleti, a flightless predatory bird
  8. Wright Flyer sculpture at Wright Brothers National Memorial, North Carolina
  9. A Pawnee Brave
  10. Cindarella With Pumpkin And Mice
  11. Get Ahead! Adult Education Classes: For Adults at No Charge - WPA Poster
  12. Comet of 1811, 19th century artwork
  13. Molecule THC
  14. Martin Luther King, Jr. (1929-1968)
  15. William Harvey
  16. Presidential portrait of Jimmy Carter
  17. Colorado - USGS State Mosaic
  18. Yutyrannus huali is a feathered tyrannosauroid from the Early Cretacous of China
  19. Conceptual image of DNA
  20. Conceptual image of influenza causing flu
  21. Can You Help Me Please
  22. Archaeopteryx
  23. Florida Everglades - USGS Earth as Art
  24. Shooting An Oil Well
  25. A Woolly Mammoth bursting out of a snowy, wooded backdrop
  26. Zasite Stone With Rudby
  27. Palmtop
  28. Tennessee - USGS State Mosaic
  29. Human Skeleton: Lateral view in Crouching Posture
  30. The musculoskeleton of the head, neck and face
  31. Teach on Mars and its Moons
  32. Anterior view of human pelvis, with labels
  33. Chinese compass, 18th century manuscript
  34. North Carolina - USGS State Mosaic
  35. Back to School
  36. School Days
  37. George Washington hears his mother convince him not to go to sea as a midshipman
  38. Knocking-off time at the Harland
  39. Plane over Battersea Power Station
  40. Battle Of Saratoga, 1777
  41. An Ioway Chief
  42. Vertebrates
  43. World War I, Map, c1919
  44. The Crusades
  45. Human nervous system, computer artwork.
  46. 1910's UK Marshmallows Book Plate
  47. Mission Santa Ynez or Ines, Solvang, California
  48. New Mexico - USGS State Mosaic