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  1. Snake skin, SEM
  2. Coloured SEM of human embryo at 16-cell stage
  3. Viral throat infection, artwork
  4. Stethoscope
  5. Joint pain, conceptual artwork
  6. Canada, Mackenzie Mountains, Ravensthroat River. Aurora Borialis
  7. Siberian Ribbons - USGS Earth as Art
  8. Rocky Mountains - USGS Earth as Art
  9. NASA, Houston, Texas
  10. DNA
  11. View Of Venus And Moon From The Surface Of Mars, A Composite Image
  12. Blood pressure gauge
  13. Canada balsam
  14. Manual worker working in a foundry
  15. Gaulard transformer, 19th century
  16. Blood samples
  17. Mineralogie III
  18. Welders Goggles I
  19. x-ray of head
  20. Spilled Paint - USGS Earth as Art
  21. Zasite Stone With Rudby
  22. Insulin receptor, molecular model
  23. Halophiles Phenomena, Dead Sea - Aerial Photograph
  24. Chromaticity diagram
  25. Refraction of light by lenses
  26. New Mexico - USGS State Mosaic
  27. 2s electron orbital
  28. Bacteria infecting a macrophage, SEM
  29. Durer's world map, 1515
  30. Human head anatomy, artwork
  31. Human evolution, artwork
  32. Skin pigmentation in Addison's disease
  33. The docking of SpaceX Dragon to the International Space Station above Earth
  34. Human tooth anatomy, diagram
  35. Heart anatomy, 19th Century illustration
  36. Anatomy of nasal sinuses
  37. Man using laptop computer
  38. Satellite view of city lights in several European and Nordic cities
  39. A Relative
  40. Internal brain anatomy, artwork
  41. Antique microscope
  42. West Virginia, Green Bank, National Radio Astronomy Observatory
  43. Microscopic view of diplococcus bacterium
  44. Tuberculosis Transfusion, 19th Century
  45. Early petrol locomotives
  46. Prehistoric tree ferns, artwork
  47. Puerto Rico - USGS State Mosaic
  48. Circulatory system, 17th century