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  1. On his rocker, instead of off, is Groucho Marx posing as Whistler's Mother
  2. Protozoa, historical artwork
  3. General Philip Kearny's fatal charge at the Battle of Chantilly
  4. Chief Joseph Brant
  5. Library Of Congress Reading Room
  6. Obama And Mandela, 2011
  7. Paul Charles Morphy (1837-84) engraved by D.J. Pound from a photograph
  8. Sailors on deck of USS Mendota gun boat during American Civil War
  9. Civil War Poster Seeking Vermont 9Th Infantry Recruits
  10. Zora Hurston Beating The Hountar (Mama Drum), 1937
  11. Thomas Edison, US inventor
  12. You Can Help, American Red Cross, 1918
  13. Total solar eclipse, 1878
  14. Study for 'Light Battery at Gettysburg'
  15. Moon Walk
  16. The Army that Fought at Sea
  17. Moses and the Burning Bush
  18. Graham Hill, waves as his car streaks toward the finish line to win the Indianapolis 500
  19. Robert Emmet McGrath, as character Bob Johnson, on Sesame Street, 1970
  20. First Atom Bomb Test Site
  21. Maat, goddess of wisdom, justice and truth, Egypt, Luxor Temple
  22. Knocking-off time at the Harland
  23. German WWII ramjet bomber blueprint
  24. The History of Our Wonderful World: The Vikings
  25. Taverns And Wagons In Western American Town
  26. James Baldwin (1924-1987
  27. President John F. Kennedy visits with reporters
  28. Sunwatch Indian
  29. Relief depicting a pharaoh making an offering, Temple of Luxor, Egypt
  30. Laocoon group, Vatican Museums
  31. Vintage World War II artwork of President Franklin Delano Roosevelt
  32. 19th Century Painting Of An African American Soldier In The Civil War
  33. View Of Danzig, Poland From River, 1939
  34. The Wonderful Story of Britain: The Boston Tea-Party
  35. Camel riders at Giza Pyramids, Giza, Cairo, Egypt, Africa
  36. View of Tangier from the Seashore, 1856-8
  37. Roy Campanella, catcher for the Brooklyn Dodgers, holding six bats, June 4, 1953
  38. Napoleonic Wars, Portrait of Haiti's leader, Toussaint L'ouverture, By Louis Bombled
  39. Pima Ki By Edward S. Curtis
  40. First Letter Carried By Pony Express
  41. Beatus of Girona. 976. Sheet 6, depiction of Saint John the Evangelist
  42. Distillation, 16th century woodcut
  43. President John F. Kennedy signing the Equal Pay Act
  44. Check Up
  45. 'Ar never gets off'
  46. Indian Motor Cycle Ambulance
  47. World War II War Bonds poster, 1943
  48. Army Of Terracotta Warriors In Xi'an, Shaanxi,China