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  1. Vermont - USGS State Mosaic
  2. Earth's Moon VI
  3. Dragon Lake - USGS Earth as Art
  4. Oregon. Close-up of Owyhee Picture Jasper stone
  5. Oregon, Owyhee. Close-up of picture jasper stone
  6. Geometry tools
  7. Mars I
  8. Signal Hill Oil Derricks
  9. Uranus I
  10. George Washington Carver
  11. Knocking-off time at the Harland
  12. Pietersite
  13. Gold Leaf Agate
  14. Abstract Artificial Crystals On Glass
  15. Earth Agate E
  16. Parana River Delta - USGS Earth as Art
  17. 50 Kilowatt Broadcasting Modulator
  18. Our Solar System I
  19. France, Corsica, Old Books In Ajaccio Municipal Library
  20. Wilson Dam, Alabama, forms portion of the Tennessee River barge route
  21. Island Rebound - USGS Earth as Art
  22. Montana - USGS State Mosaic
  23. Pluto I
  24. Rugged Terrain - USGS Earth as Art
  25. Ghostly Grease Ice - USGS Earth as Art
  26. Close-Up Of Fortification Laguna Agate
  27. Waziristan Hills - USGS Earth as Art
  28. New Hampshire - USGS State Mosaic
  29. Silversmith at work, c.1914
  30. Geometry set
  31. Abacus.
  32. Malaspina Glacier - USGS Earth as Art
  33. Discovery Hind Leg Of The Dinosaur Diplodocus, By Henry Fairfield Osborn In 1898
  34. Saturn II
  35. Vintage School VII
  36. Mae Jemison (1956- )
  37. The Sun II
  38. College Graduation Ceremony
  39. Relief depicting the union between Upper Egypt and Lower Egypt, Egypt
  40. President Kennedy greets Peace Corps Volunteers on the White House South Lawn
  41. Siberian Ribbons - USGS Earth as Art
  42. Rocky Mountains - USGS Earth as Art
  43. Chiropractic skeleton
  44. Definition of anthropology
  45. Susan Brownell Anthony, c.1890-1906
  46. Zasite Stone With Rudby
  47. Spilled Paint - USGS Earth as Art
  48. x-ray of head