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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. Photomicroscopic close up of a snowflake crystal
  7. Abraham Lincoln, 1809
  8. Martin Luther King, Jr. (1929-1968)
  9. The bones of the pelvis
  10. Alberta, Reserve, c1890
  11. Microscopic view of bacteria
  12. Meandering Mississippi - USGS Earth as Art
  13. 'Rheumatoid arthritis of the hands, X-ray
  14. Molecule Cinnamon
  15. Base of human skull, inferior view, with labels
  16. Signature of John Hancock
  17. Capitol From the Botanical Gardens
  18. Scrooge Objects to Christmas. Illustration for the novella A Christmas Carol
  19. Florence Nightingale (1820-1910) illustration from World Noted Women
  20. Bears
  21. Normal hip, X-ray
  22. Wingate Pass Agate, Ca
  23. Spilled Paint - USGS Earth as Art
  24. Illustration By Arthur Rackham From Grimm's Fairy Tale, The Cunning Little Tailor
  25. Denver, Colorado, 1859
  26. The sun sets behind a row of spinning windmills or wind turbines
  27. Good Grades and Good Health Go Together - WPA Poster
  28. Solar System II
  29. Portrait of Patrick Henry (1736-99)
  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. Shame may be Fatal - WPA Poster
  33. Pennsylvania, Gettysburg, Battle of Gettysburg, tree and battlefield monument, dawn
  34. Winston Churchill (1874-1965) in Naval Scene
  35. A Pawnee Brave
  36. The Teacher
  37. School supplies
  38. Molecule Licorice
  39. Arteries of the brain, 3D CT scan
  40. Mistletoe - Botanical Illustration
  41. Mexican Revolution (1910-19). Train with wounded revolutionary fighters
  42. Lena Delta - USGS Earth as Art
  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. Mathematical Elements IV