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  1. Chrysocolla
  2. Laika the space dog postcard
  3. Molecule Ethanol
  4. Patent--Light Bulb
  5. Bicycle diagram, 19th century
  6. Early electrical equipment
  7. Comparing the eight major planets on the same scale
  8. External auditory canal of human ear (with labels)
  9. Human spine, side view
  10. Dental anatomy
  11. Northern celestial map
  12. Soap bubbles on a dodecahedral frame
  13. Bright Periodic Table - White, Modern Text
  14. Mass spectrometer
  15. Microphone
  16. Malachite
  17. Oil Pump Jacks On Canadian Prairie At Dusk, Carlyle, Saskatchewan, Canada
  18. Van Gogh from Space - USGS Earth as Art
  19. High speed photograph of bullet leaving gun
  20. Leonid meteor shower of 1833, artwork
  21. Close Ups Of Fortification On Crazy Lace Agate
  22. Earth
  23. Female hormone
  24. Cross section of planet Earth showing the inner core
  25. 1832 Darwin's ship HMS Beagle plan
  26. Cross-section of human heart. cardiovascular system
  27. Signal Hill Oil Derricks
  28. Microscopic view of coronavirus
  29. 16th century world map
  30. Microscope
  31. Armillary sphere
  32. Bogda Mountains - USGS Earth as Art
  33. Medical illustration of human leg muscles, four side views
  34. Respiratory Anatomy, 19th Century Artwork
  35. DNA
  36. Conceptual image of neuron
  37. Map showing the Local Arm in the Milky Way
  38. A Phrenological Map Of The Human Brain. From Virtue's Household Physician, 1924
  39. Earth's magnetosphere, artwork
  40. Conceptual image of mitosis
  41. Electronic simulator, 1954
  42. Flying Machine, drawing by Leonardo da Vinci. Ca. 1488
  43. Earth Agate A
  44. CT scan of brain
  45. Stethoscope
  46. Mushroom Chart I light
  47. Wave energy
  48. Molecular model