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  1. Embryonic development
  2. Ulcerative colitis, SEM
  3. Liesegang patterns
  4. Heart valve and strings, SEM
  5. Arterial embolism
  6. Generalized Flower And Arrangement Of Floral Parts At The Flower's Base
  7. The docking of SpaceX Dragon to the International Space Station above Earth
  8. Albert Einstein, physicist
  9. Skeleton Chart
  10. Microscopic view of Giardiasis
  11. Berliner helicopter, 1922
  12. Fehling's test for sugars
  13. Soap bubbles
  14. Rear view of acupuncture model
  15. Carboniferous landscape
  16. 14th century theological cosmography
  17. Pylons in a rural landscape at dusk
  18. Abstract line pattern.
  19. Crystal
  20. Thoracic and abdominal muscle
  21. Anterior view of human skull, with labels
  22. Cross section image of human head
  23. Fossil remains and skeletal reconstruction of Tianyulong confuciusi
  24. Galen lecturing on anatomy in Rome
  25. Insulin Crystals, Light Micrograph
  26. Fingerprint, computer artwork
  27. Electromagnetic spectrum, artwork
  28. Extinct dodo
  29. Pharmacology lab work
  30. Male muscles, artwork
  31. Pterodactylus Birds Cleaning The Mouth Of A Tyrannosaurus Rex
  32. Human Skull
  33. Archaeopteryx
  34. Amateur astronomy, computer artwork
  35. The Heavens II
  36. Spinal cord anatomy, 1844 artwork
  37. Auditory ossicles of the middle ear. sensory organ
  38. Electronic and biologic systems, artwork
  39. Florida Everglades - USGS Earth as Art
  40. The Man and the Alembic
  41. Conceptual image of salmonella
  42. Alabama - USGS State Mosaic
  43. Allosaurus dinosaur skeleton
  44. Conceptual image of DNA
  45. xDNA molecule
  46. Various pollen grains
  47. Microscopic view of immunoglobulin G antibodies
  48. Illustration of arthritis sites on the body