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  1. DNA helix
  2. Animal Life Spans
  3. Earth's magnetosphere, artwork
  4. Bronchial tree and lungs, artwork
  5. The Rainforest
  6. Cannabinoid receptor binding, artwork
  7. Spatial dimensions, conceptual artwork
  8. Portrait of Carl Friedrich Gauss, 1840
  9. Early map of the Moon, 1772
  10. Bony framework of head and neck. skeletal system
  11. Total solar eclipse, 1878
  12. Artwork of the pterosaur, Pteranodon sp
  13. Tuberculosis bacteria, artwork
  14. Replica Of Eli Whitney's Cotton Gin
  15. Patent--Light Bulb
  16. Normal knee, X-ray
  17. 2p electron orbitals
  18. Gold nugget held in tweezers
  19. Human skull
  20. Mars topographical map, satellite image
  21. Anatomy of human vertebra
  22. The Optimist - USGS Earth as Art
  23. Practical Mechanics, November 1955
  24. Refraction
  25. Marie Curie
  26. DNA assembly, artwork
  27. Ernst Haeckel Map Lemuria Human Origins
  28. Newspapr Rock Petroglyphs, Utah
  29. Newton's Cradle in Motion
  30. Stamp out Syphilis and Gonorrhea - WPA Poster
  31. 'Rheumatoid arthritis of the hands, X-ray
  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. Moon Chart I
  38. Brain anatomy, artwork
  39. X-ray view of human foot
  40. Early Stone Implements
  41. Colorized image of HIV-infected H9 T-cell
  42. The human skeleton and muscular system, front view
  43. Conceptual image of DNA
  44. The International Space Station
  45. Artwork of cervical vertebra from human spine
  46. Marie Curie, Polish-French physicist
  47. Molecule Water
  48. Von Karman Vortices - USGS Earth as Art