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