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  1. Famous prehistoric rock paintings of Tassili N'Ajjer, Algeria
  2. The Birth of Rostam by Caesarean. Shahnameh. The Book of Kings. 16th c. Persian Art
  3. Vintage Parchment Stethoscope Patent Poster
  4. Che Guevara
  5. The building of the Union Pacific Railroad
  6. Bronchial tree and lungs, artwork
  7. Animal Life Spans
  8. World War II painting of Winston Churchill wearing his RAF uniform
  9. Alternating Motor - Blue
  10. The Rainforest
  11. Muir Woods National Monument, California - John Muir Portrait: Retro Poster
  12. Portrait of Samuel Adams (1722-1803)
  13. Moses and the Burning Bush
  14. Soap bubbles on a dodecahedral frame
  15. Replica Of Eli Whitney's Cotton Gin
  16. Grammar Lesson
  17. Spatial dimensions, conceptual artwork
  18. Patent--Light Bulb
  19. Mohawk Village, 1780
  20. Antique Stock Certificate IV
  21. Hairdresser
  22. Print of folk hero and frontiersman Davy Crockett
  23. Drafting the Declaration of Independence, 28th June 1776, detail of Thomas Jefferson
  24. Vintage Parchment Incandescent Lamp Socket Patent Poster
  25. Thomas
  26. Women's Rights Parade, 1913
  27. Vintage Parchment Tesla Operating Electric Motors Map Poster
  28. The Outward Bound, 1912
  29. Practical Mechanics, November 1955
  30. Stamp out Syphilis and Gonorrhea - WPA Poster
  31. Normal knee, X-ray
  32. Purple Watercolor Agate I
  33. The Optimist - USGS Earth as Art
  34. Moon Walk
  35. Christian's Conflict With Apollyon. From The Book The Pilgrim's Progress
  36. Molecule Water
  37. Marie Curie
  38. Colon blood vessels, light micrograph
  39. Conceptual image of DNA
  40. Von Karman Vortices - USGS Earth as Art
  41. Early Stone Implements
  42. Colorized image of HIV-infected H9 T-cell
  43. 'Rheumatoid arthritis of the hands, X-ray
  44. American War of Independence
  45. The Planet Mars
  46. Tesla
  47. Smilodon sabertooth mother and her cubs
  48. Pair of human hands on black background.