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  1. High angle view of a river, Montana
  2. Mountains in a landscape, Hellgate Gulch, Montana
  3. Teton National Park WY
  4. Castor oil stem, light micrograph
  5. Rear view of an ice climber, Colorado
  6. Development of Arabic numerals
  7. Yosemite Fall Yosemite National Park
  8. Le Mans 1935
  9. Marjoram
  10. Nutcracker II
  11. Strength
  12. Neon Canyon Grand Staircase National Monument UT
  13. President Figueiredo Rain Forest Amazon Brazil
  14. 16th century world map
  15. Gaulard transformer, 19th century
  16. Global temperatures, April 2003
  17. Heel skin tissue, light micrograph
  18. Homo floresiensis
  19. Human nervous system from behind, artwork
  20. Jurassic dinosaurs
  21. Mammals of the Pleistocene era
  22. Wahkeena Waterfall Columbia Gorge OR
  23. Motherboard connectors
  24. Barn and Wheat Field WA
  25. Winter Yosemite National Park CA
  26. El Capitan Yosemite National Park CA
  27. The Palouse Spokane Co WA
  28. Sea surface density, global map
  29. Solar park, Ciudad Real, Spain
  30. Spinal cord anatomy, 1844 artwork
  31. Stages in female human evolution
  32. Stages in human evolution
  33. Table comparing ancient scripts
  34. Mrs. Carl Meyer, Later Lady Meyer, And Her Two Children
  35. Sol Duc Falls Olympic National Park WA
  36. Woman with a Fan (Lunia Czechowska) 1919
  37. Canadian Rockies from Airplane Window
  38. Lounge Chairs Moosehead Lake ME
  39. California, San Diego, Convention Center in San Diego
  40. Denmark, Copenhagen, Nyhavn
  41. The Haunted House
  42. The Abduction of Psyche
  43. Suprematist Composition, 1915
  44. St.Francis of Assisi (c.1182-1220)
  45. Sisters, 1868
  46. Water falling from rocks, River Twiss, Thornton Force, Ingeleton, North Yorkshire, England
  47. Hong Kong
  48. Neuschwanstein Castle Allgau Germany