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  1. Sectioned male head
  2. DNA autoradiogram
  3. Lie detector test
  4. Human blood cells, SEM
  5. Estimated Number Of Known Living Species
  6. Cell division
  7. National Radio Astronomy Observatory, Green Bank, West Virginia
  8. Wire Frame Render of a Clock Mechanism, Close-up
  9. Coronary artery disease
  10. Earth's celestial circles, 1708 artwork
  11. Antibiotic acting on bacteria
  12. Early video phone system, 1930
  13. Table of mathematical functions
  14. Dentistry equipment
  15. Liver proteins
  16. Coloured LM of a normal female karyotype
  17. Akpatok Island - USGS Earth as Art
  18. Doctors examining MRI scans
  19. Platelet activation, artwork
  20. Alabama - USGS State Mosaic
  21. 5f electron orbitals, cubic set
  22. Illustration of muscle contraction
  23. DNA replication, artwork
  24. Waves on a white dwarf star
  25. Wire Frame Render of a Clock Mechanism
  26. Pylons in a rural landscape at dusk
  27. Salt dissolution, artwork
  28. Adult human skull
  29. Artwork: penetration of skin by various lasers
  30. Liver cells, TEM
  31. Carboniferous landscape
  32. Crystal
  33. Blood screening
  34. Lung bronchioles
  35. Viral throat infection, artwork
  36. Lungs
  37. Microscopic view of Giardiasis
  38. Medical zodiac, 15th century diagram
  39. Bacterial contamination tests
  40. Platelet, artwork
  41. The cervical vertebrae
  42. Walnut tree trunk
  43. Kidney glomeruli, SEM
  44. Leukemia cells, TEM
  45. Foot bones and ligaments
  46. Chemistry equipment
  47. Forensic pathology research
  48. Artwork of Caudipteryx sp., a bird-like dinosaur