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  1. Microscopic view of poliovirus
  2. Boring a hole
  3. Pascal's calculator, 17th Century artwork
  4. Human blood cells, SEM
  5. Lie detector test
  6. HIV reverse transcription enzyme
  7. DNA autoradiogram
  8. Cholinesterase enzyme
  9. Amethyst crystals
  10. Common Dolphins
  11. Table of mathematical functions
  12. Foot anatomy, 19th Century illustration
  13. Sectioned male head
  14. Estimated Number Of Known Living Species
  15. Cell division
  16. Coronary artery disease
  17. Wire Frame Render of a Clock Mechanism, Close-up
  18. Foot anatomy
  19. Earth's celestial circles, 1708 artwork
  20. Antibiotic acting on bacteria
  21. Early video phone system, 1930
  22. Dentistry equipment
  23. Coloured LM of a normal female karyotype
  24. Platelet activation, artwork
  25. Doctors examining MRI scans
  26. Liver proteins
  27. Waves on a white dwarf star
  28. Akpatok Island - USGS Earth as Art
  29. DNA replication, artwork
  30. Illustration of muscle contraction
  31. Alabama - USGS State Mosaic
  32. Crystal
  33. Artwork: penetration of skin by various lasers
  34. 5f electron orbitals, cubic set
  35. Liver cells, TEM
  36. Wire Frame Render of a Clock Mechanism
  37. Blood screening
  38. Microscopic view of Giardiasis
  39. Salt dissolution, artwork
  40. Adult human skull
  41. Pylons in a rural landscape at dusk
  42. Lung bronchioles
  43. Carboniferous landscape
  44. Lungs
  45. Viral throat infection, artwork
  46. Medical zodiac, 15th century diagram
  47. Forensic pathology research
  48. Platelet, artwork