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  1. Conceptual image of human eye and skull
  2. Conceptual image of human backbone
  3. Conceptual image of platelets with red blood cells
  4. A Scientist In A Lab
  5. University of Virginia, Charlottesville, Virginia
  6. The American University, Beirut, Lebanon
  7. St. Francis Xavier University, Antigonish, Nova Scotia, Canada
  8. Library of the Collegium Maius Museum, Krakow, Poland
  9. Interior of the Library, Trinity College, Dublin, Eire (Republic of Ireland)
  10. Relief depiction of Ramses II, Temple of Luxor, Egypt
  11. Relief depicting the union between Upper Egypt and Lower Egypt, Egypt
  12. Relief depicting a pharaoh making an offering, Temple of Luxor, Egypt
  13. Detail of hieroglyphic writing. Museum of Fine Arts. Budapest. Hungary
  14. Canada, Quebec. Honey Economusee. Beehive
  15. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  16. Australia, Northern Territory, Arnhem Land, Mt Borradaile, rock paintings
  17. Palmtop
  18. Man using laptop computer
  19. Italy, Sicily, Siracusa, Monte Lauro, wind turbine
  20. The Rosetta Stone
  21. Pencil Nub and Equation
  22. Grammar Lesson
  23. Young boy in school writing on chalkboard
  24. Scottish regiment fighting German troops at Battle of Loos
  25. Illustration of strip of land known as the 'fertile crescent'
  26. Interiors of a library, Peabody Institute, Johns Hopkins University, Baltimore, Maryland
  27. Linguistics table, 17th century
  28. The Country School
  29. Vintage Civil War print of the Battle of Gettysburg
  30. Vintage Civil War print of the Battle of Fredericksburg
  31. Vintage Civil War print of the Battle of Franklin
  32. Vintage Civil War Print of the Battle of Five Forks
  33. Vintage Civil War print of the Battle of Cold Harbor
  34. Vintage Civil War print of President Abraham Lincoln and his cabinet
  35. Vintage Civil War print of General William Tecumseh Sherman
  36. Vintage Civil War Print of General Ulysses S. Grant
  37. Vintage Civil War print of General Sherman and his Generals on horseback
  38. Vintage Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  39. Vintage Civil War print of a Union Drummer Boy holding a rifle on battlefield
  40. Vintage Civil War print featuring the Battle of Gettysburg
  41. Vintage Civil War poster of the Battle of Missionary Ridge
  42. Revolutionary War Painting showing the surrender of British General John Burgoyne
  43. Civil War print showing the Naval Battle of the Monitor and The Merrimack
  44. Civil War print of General Lee surrendering his Confederate forces to General Grant
  45. Civil War print depicting the Union Army's capture of Fort Fisher
  46. Civil War painting of Union and Confederate troops fighting at The Battle of Bull Run
  47. Civil War painting of Union and Confederate troops fighting at The Battle of Antietam
  48. Civil War era color print of President Abraham Lincoln and wife at their last reception