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  1. Doctor examining MRI scans
  2. Caduceus, artwork
  3. Brontotherium, a family of extinct mammals
  4. Early escalator, 1894
  5. Can evacuated by vacuum pump
  6. Arm anatomy, historical artwork
  7. Grass stem, SEM
  8. Retina with neovascularization
  9. Carrion Beetle, SEM
  10. A Herd Of Centrosaurus Dinosaurs
  11. Illustration of action potential of a nerve cell
  12. Sleeping sickness parasite
  13. Group 2 metals
  14. The bones of the head, neck and face
  15. Lunar Gateway Space Station Concept, Complete View
  16. Brachiosaurus Herd On The Move
  17. Human evolution
  18. Coiled lily leaf, SEM
  19. Doctor's stethoscope
  20. STS-128 Mission
  21. Pumping engines, 19th century
  22. Semicircular canal, diagram
  23. Arachnid anatomy, artwork
  24. Dissected eye, 1844 artwork
  25. Healthy teeth, artwork
  26. STS-112 Mission
  27. Blood vessel
  28. ITER fusion research reactor
  29. ATP Synthase Enzyme Complex, Illustration
  30. E. coli bacteria strain O157:H7, TEM
  31. Winter's bark (Drimys winteri) pollen, SEM
  32. Antibiotic mechanism of action, artwork
  33. Human immune response, artwork
  34. Tendon fibres, SEM
  35. Mesohippus, Extinct Horse
  36. Indian mustard seedling (Brassica juncea)
  37. Apothecary, satirical artwork
  38. Blood vessel anatomy
  39. Artwork of intestinal hookworm causing anaemia
  40. Biofuel research
  41. Lunar Gateway Space Station Concept, Complete View
  42. Narrowed coronary artery, artwork
  43. Cross section of human heart
  44. Microscopic view of Listeria monocytogenes
  45. Heart after heart attack
  46. DNA sequences
  47. Tomato plant
  48. Pollen grains, SEM