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  1. No Man's Land - USGS Earth as Art
  2. Blood clot, SEM
  3. Human anatomy showing deep muscles in the neck and upper back
  4. Artist's Rendering Of A Solar System
  5. Normal shoulder, X-ray
  6. Winston Churchill (1874-1965) in Naval Scene
  7. The vertebral column
  8. Teacher's desk in classroom
  9. Stamp out Syphilis and Gonorrhea - WPA Poster
  10. Diphtheria treatment, artwork
  11. Newsboy Ned Parfett announcing the sinking of the 'Titanic' on April 16, 1912
  12. Hampton Institute, 1899
  13. The Last of the Spirits. Illustration for the novella A Christmas Carol
  14. Kentucky - USGS State Mosaic
  15. James Monroe, by Gilbert Stuart, 1817
  16. Molecule Milk
  17. Arkansas - USGS State Mosaic
  18. The Moon
  19. The Summit Of Little Round Top During the Battle Of Gettysburg, 1863
  20. Minnesota - USGS State Mosaic
  21. Idaho - USGS State Mosaic
  22. Abraham Lincoln, 1809
  23. Richat Structure - USGS Earth as Art
  24. Normal spine, X-ray
  25. Sagenite On Mexican Agate
  26. If I Were A Cloud
  27. Utah - USGS State Mosaic
  28. George And Martha Washington At Presidential Reception
  29. Pipestone Quarry On the Coteau Des Prairies, 1836
  30. Mark Twain , 1901
  31. Full on view of a Woolly Mammoth
  32. The Making of America
  33. Portrait of Booker T. Washington sitting in a chair
  34. Behemoth and Leviathan
  35. The First Public Reading of the Declaration of Independence
  36. Oscar Wilde
  37. Elastic artery cross-section, SEM
  38. The four terrestrial planets compared in scale
  39. Long Island Railroad Communication Lines
  40. Samuel Langhorne Clemens, 1835
  41. Tuberculosis, Don't Kiss Me!: Your Kiss of Affection, the Germ of Infection - WPA Poster
  42. Paul Charles Morphy (1837-84) engraved by D.J. Pound from a photograph
  43. Zora Hurston Beating The Hountar (Mama Drum), 1937
  44. The Shipwrecked Man and the Sea, illustration from Aesop's Fables
  45. President John F. Kennedy signing the Equal Pay Act
  46. 'Ar never gets off'
  47. Venus
  48. Silversmith at work, c.1914