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  1. Embryo development 24-36 hours after fertilization
  2. Amethyst crystals
  3. Vintage Parchment Windmill 1906 Patent Poster
  4. Northern celestial map
  5. Rocket launch
  6. Medical illustration detailing thoracic outlet syndrome
  7. Salmonella bacteria, SEM
  8. American Frohse Anatomical Wallcharts, Plate II
  9. Apollo Missions - Green Print: Retro Travel Poster
  10. Microscopic view of coronavirus
  11. Human anatomy showing deep muscles in the neck and upper back
  12. Architectural drawings
  13. The docking of SpaceX Dragon to the International Space Station above Earth
  14. Body musculature
  15. Bicycle diagram, 19th century
  16. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  17. Stem cells, artwork
  18. Skeleton Leans on Wall
  19. Electronic simulator, 1954
  20. Castor oil stem, light micrograph
  21. Chinese acupuncture model
  22. Gas bubbles in oil
  23. Genetic code
  24. Lunar map of 1854
  25. Early electric lamps
  26. Ear trumpets
  27. Osteoclasts eroding bone in osteoporosis
  28. Electromagnetic spectrum
  29. Medical illustration of human leg muscles, four side views
  30. DNA molecule, artwork
  31. Superior view of human brain with colored lobes and labels
  32. Growth rings of a scots pine tree
  33. Gem Stones I
  34. Indigo Agate C
  35. Bolivia, Potosi, Amethyst in a Bolivian museum
  36. Galileo thermometer
  37. Normal shoulder, X-ray
  38. Earth
  39. Close-up of an electronic circuit board
  40. Muscles of the neck
  41. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  42. Alan Turing, British mathematician
  43. Heart attack, artwork
  44. Cross section of planet Earth showing the inner core
  45. Leaded
  46. Stacked Agate I
  47. Male urinary bladder and urethra. urinary system
  48. Bacterial Growth On Culture Media