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  1. Distillation, 16th century woodcut
  2. Diphtheria treatment, artwork
  3. Digestive system, artwork
  4. Development of Arabic numerals
  5. Detached blood clot, artwork
  6. Cryptogamic plants, 19th century artwork
  7. Conrad Gessner's nature collection
  8. Concentrating sunlight, 17th century
  9. Comet of 1811, 19th century artwork
  10. Circulatory system and brain, artwork
  11. Circulatory system and brain, artwork
  12. Cingulate gyrus in the brain, artwork
  13. Chloroform analysis, 19th century artwork
  14. Chinese compass, 18th century manuscript
  15. Cardiovascular system, artwork
  16. Cannabinoid receptor binding, artwork
  17. Bronchial tree and lungs, artwork
  18. Brain, artwork
  19. Brain, artwork
  20. Brain coral, artwork
  21. Brain antomy, 19th century artwork
  22. Blood vessels and kidneys, artwork
  23. Blood types, conceptual image
  24. Blood spectra, 19th century artwork
  25. Blood cells in blood vessel, artwork
  26. Bacterial lung infection
  27. Araticum ape, annona montana, artwork
  28. 15th century surgical equipment, artwork
  29. Australopithecus afarensis, artwork
  30. Wave energy
  31. Water ripples
  32. Vitamin C molecule
  33. Torus
  34. Torus
  35. Subatomic particles abstract
  36. Spintronics research, STM
  37. Spatial dimensions, conceptual artwork
  38. Ribozyme molecule
  39. Rhodopsin protein molecule
  40. Quark structure of silicon atom nucleus
  41. Protein tyrosine phosphatase molecule
  42. Polymer molecular structure
  43. Peony flowers
  44. Optical pattern
  45. Nuclear fusion reactions
  46. Molecular structure
  47. Molecular model
  48. Microglobulin protein, molecular model