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  1. Sagenite On Mexican Agate
  2. Mars map from 1881
  3. X-ray of a chest cavity
  4. Costellazioni II
  5. Stethoscope
  6. Underwater earthquake and tsunami
  7. Pipetting
  8. Paracelsus and the Basel tribunal
  9. Ammonites
  10. 1824 Buckland's Megalosaurus limb bones
  11. Front and side views of pelvis in chimpanzee, Australopithecus, and modern human
  12. Molecule Testosterone
  13. The Pharmacist
  14. Copper sulphate and magnesium sulphate
  15. Laboratory Equipments
  16. Small intestine villi, section
  17. Anatomy of human face and neck muscles, front view
  18. Paisley Agate
  19. The New Photography Or X Ray Photography From The Modern Cyclopedia Vol VI 1903
  20. Concentrating sunlight, 17th century
  21. Microscopic view of multiple nerve cells, known as neurons
  22. Anatomy of the bronchus and bronchial tubes
  23. Antique laudanum bottle
  24. Citric acid crystals magnified 100x
  25. Pond life
  26. Heart and lungs
  27. Cardiovascular system, artwork
  28. Wernher von Braun, German rocket designer
  29. Heart And Lungs, Historical Illustration
  30. Patent--Hot Air Balloon
  31. CDF particle detector, Fermilab
  32. Testosterone hormone
  33. Molecule Estrogene
  34. Velociraptor
  35. Comparison of healthy gums versus gingivitis
  36. Skeleton of a Neanderthal compared with that of a modern human
  37. Conversion
  38. Caribbean Luxury - USGS Earth as Art
  39. Nikola Tesla
  40. Mining drill core sample with gold content
  41. Walnut tree trunk
  42. Normal wrist, X-ray.
  43. Shooting An Oil Well
  44. Star trails and bioluminescence, Gippsland Lakes, Australia
  45. Idaho - USGS State Mosaic
  46. Bogda Mountains - USGS Earth as Art
  47. Heart anatomy, 18th century
  48. Nerve cell, artwork