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