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  1. DNA helix
  2. Iron pyrites
  3. Bronchial tree and lungs, artwork
  4. Animal Life Spans
  5. Cannabinoid receptor binding, artwork
  6. The Rainforest
  7. Early map of the Moon, 1772
  8. Portrait of Carl Friedrich Gauss, 1840
  9. Artwork of cervical vertebra from human spine
  10. Artwork of the pterosaur, Pteranodon sp
  11. Replica Of Eli Whitney's Cotton Gin
  12. Tuberculosis bacteria, artwork
  13. Vintage Parchment Incandescent Lamp Socket Patent Poster
  14. Human skull
  15. Bony framework of head and neck. skeletal system
  16. Spatial dimensions, conceptual artwork
  17. Gold nugget held in tweezers
  18. Anatomy of human vertebra
  19. Mars topographical map, satellite image
  20. 2p electron orbitals
  21. Patent--Light Bulb
  22. The Optimist - USGS Earth as Art
  23. Practical Mechanics, November 1955
  24. Marie Curie
  25. Normal knee, X-ray
  26. Refraction
  27. DNA assembly, artwork
  28. Newton's Cradle in Motion
  29. Ernst Haeckel Map Lemuria Human Origins
  30. Stamp out Syphilis and Gonorrhea - WPA Poster
  31. Newspapr Rock Petroglyphs, Utah
  32. DEC PDP-1 computer
  33. Muscles of the side and back
  34. Canada, Manitoba, Churchill Northern lights
  35. Sound byte, artwork
  36. Colon blood vessels, light micrograph
  37. Conceptual image of DNA
  38. Brain anatomy, artwork
  39. Early Stone Implements
  40. Colorized image of HIV-infected H9 T-cell
  41. The International Space Station
  42. 'Rheumatoid arthritis of the hands, X-ray
  43. Molecule Water
  44. Marie Curie, Polish-French physicist
  45. Von Karman Vortices - USGS Earth as Art
  46. Cell
  47. Beetle compound eye, light micrograph
  48. Indigo Agate D