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  1. 16th century world map
  2. Respiratory Anatomy, 19th Century Artwork
  3. E. coli bacteria, SEM
  4. Museum of Science and Industry Vehicles - Chicago, IL: Retro Travel Poster
  5. Tyrannosaurus rex dinosaur skull
  6. Conceptual image of mitosis
  7. Conceptual image of neuron
  8. Muscles of the abdominal wall - anterior view
  9. Jurassic life, artwork
  10. Stacked Agate II
  11. 1951 space shuttle design
  12. Lung tissue, TEM
  13. Body musculature
  14. Jurassic dinosaurs
  15. Leonid meteor shower of 1833, artwork
  16. Pipette Dripping Liquid Into Test Tubes
  17. Grey Agate B
  18. Sunflower - Botanical Illustration
  19. The Saturday Evening Post, Do As Your Doctor Tells You
  20. Sir Isaac Newton
  21. Wire Your Home Window Display
  22. Caduceus, artwork
  23. Semiconservative DNA Replication
  24. Southern celestial map
  25. Brain, artwork
  26. ECGs of a normal heart rate, artwork
  27. Bracken rhizome, light micrograph
  28. Cardiac muscle, TEM
  29. Apothecary
  30. Artwork showing Chicxulub impact crater, Yucatan
  31. Green Blue Optic fiber
  32. Stethoscope
  33. Armillary sphere
  34. Medical illustration detailing thoracic outlet syndrome
  35. Femur - anterior view. skeletal system
  36. Van Gogh from Space - USGS Earth as Art
  37. Wave energy
  38. Heart anatomy, 19th Century illustration
  39. Computer hard disk assembly
  40. Antique pharmacy bottles
  41. Lung cells, fluorescent micrograph
  42. Plant cell
  43. Wilson Dam, Flood Gates
  44. Bees
  45. Depiction of different phases of the Moon by Galileo Galilei
  46. DNA molecule, artwork
  47. Normal hip, X-ray
  48. Embryo development 24-36 hours after fertilization