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  1. Electromagnetic spectrum
  2. Human anatomy showing deep muscles in the neck and upper back
  3. Northern celestial map
  4. Rocket launch
  5. Carl Sagan
  6. Normal hip, X-ray
  7. American Frohse Anatomical Wallcharts, Plate II
  8. Close-up of an electronic circuit board
  9. Apollo Missions - Green Print: Retro Travel Poster
  10. The docking of SpaceX Dragon to the International Space Station above Earth
  11. Surveyors Wanted to Explore Mars and its Moons
  12. Architectural drawings
  13. Body musculature
  14. Bicycle diagram, 19th century
  15. Stem cells, artwork
  16. Ear trumpets
  17. Castor oil stem, light micrograph
  18. Virus particles entering cells, artwork
  19. Microscopic view of coronavirus
  20. Electronic simulator, 1954
  21. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  22. Skeleton Leans on Wall
  23. Female hormone
  24. Early electric lamps
  25. Digestive system, artwork
  26. Lunar map of 1854
  27. Bolivia, Potosi, Amethyst in a Bolivian museum
  28. Splashing wave, split view
  29. Osteoclasts eroding bone in osteoporosis
  30. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  31. Chinese acupuncture model
  32. 1858 Prehistoric marine reptiles
  33. Indigo Agate C
  34. Gas bubbles in oil
  35. Galileo thermometer
  36. Cherry Tree - Botanical Illustration
  37. Alan Turing, British mathematician
  38. Medical illustration of human leg muscles, four side views
  39. Cross section of planet Earth showing the inner core
  40. Superior view of human brain with colored lobes and labels
  41. Muscles of the neck
  42. Stacked Agate I
  43. Leaded
  44. Normal shoulder, X-ray
  45. Earth
  46. Medical equipment on a tray
  47. Bacterial Growth On Culture Media
  48. Study of the Human Figure, Lateral View