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  1. Distance of Sun, Moon and Planets
  2. Civil War, Texas Rangers, 1861
  3. Bouncing ball
  4. Normal shoulder, X-ray
  5. Artist's Rendering Of A Solar System
  6. Abraham Lincoln, 1809
  7. Photomicroscopic close up of a snowflake crystal
  8. Martin Luther King, Jr. (1929-1968)
  9. The bones of the pelvis
  10. Alberta, Reserve, c1890
  11. Meandering Mississippi - USGS Earth as Art
  12. Microscopic view of bacteria
  13. 'Rheumatoid arthritis of the hands, X-ray
  14. Molecule Cinnamon
  15. Capitol From the Botanical Gardens
  16. Signature of John Hancock
  17. Base of human skull, inferior view, with labels
  18. Scrooge Objects to Christmas. Illustration for the novella A Christmas Carol
  19. Bears
  20. Florence Nightingale (1820-1910) illustration from World Noted Women
  21. Spilled Paint - USGS Earth as Art
  22. Wingate Pass Agate, Ca
  23. Normal hip, X-ray
  24. Illustration By Arthur Rackham From Grimm's Fairy Tale, The Cunning Little Tailor
  25. The sun sets behind a row of spinning windmills or wind turbines
  26. Good Grades and Good Health Go Together - WPA Poster
  27. Denver, Colorado, 1859
  28. Portrait of Patrick Henry (1736-99)
  29. Solar System II
  30. Faridun's Sons Marry the Three Daughters of Sero. Shahnameh. The Book of Kings
  31. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  32. Pennsylvania, Gettysburg, Battle of Gettysburg, tree and battlefield monument, dawn
  33. Shame may be Fatal - WPA Poster
  34. The Teacher
  35. Winston Churchill (1874-1965) in Naval Scene
  36. A Pawnee Brave
  37. Molecule Licorice
  38. Mistletoe - Botanical Illustration
  39. Arteries of the brain, 3D CT scan
  40. School supplies
  41. Lena Delta - USGS Earth as Art
  42. Mexican Revolution (1910-19). Train with wounded revolutionary fighters
  43. Vintage American History painting of Alexander Hamilton
  44. Poe
  45. Pair of human hands on black background.
  46. Wilson Dam, Flood Gates
  47. Gem Stones III
  48. Bees - Vintage Educational Poster