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