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  1. Brain antomy, 19th century artwork
  2. Healthy brain, MRI scans
  3. Cyanobacteria, SEM
  4. Muscles used in cycling, 19th century
  5. The bones of the head, neck and face
  6. Bronchodilator drug crystals, SEM
  7. Orbits of Galileo spacecraft around Jupiter
  8. Functional areas of the brain, artwork
  9. Agate Geode I
  10. Arthritis of the hip, X-ray
  11. T-Rex Fighting A Group Of Triceratops
  12. Close Ups Of Fortification On Crazy Lace Agate
  13. Mars
  14. Human heart, artwork
  15. Normal hip, X-ray
  16. Artwork of a plesiosaur dinosaur hunting
  17. Telephone switchboard operator, 1914
  18. Conceptual image of DNA
  19. Woolly mammoths
  20. The vertebral column
  21. Animal Cell, Illustration
  22. Wind turbine in rural location with old barn in Cavalier County, USA
  23. Artwork of a Tyrannosaurus rex dinosaur
  24. Energy
  25. Artwork based on Mauna Kea of a telescope dome
  26. Watch gears, SEM
  27. Tyrannosaurus
  28. Edwin Hubble, US astronomer
  29. Human skeleton
  30. Normal knee, X-ray
  31. H1N1 flu virus particle, artwork
  32. Legend of Archimedes and the lever
  33. Lungs in situ - anterior view. respiratory system
  34. Rosalind Franklin, British chemist
  35. DNA nucleotides, artwork
  36. Tennessee - USGS State Mosaic
  37. Human digestive system, with labels
  38. Garden Tulip - Botanical Illustration
  39. Evolution of man
  40. Michigan - USGS State Mosaic
  41. Portrait of Michael Faraday (1791-1867) 1841-42
  42. Conybeare Plesiosaurus reconstruction
  43. Star trails and bioluminescence, Gippsland Lakes, Australia
  44. Burst of energy forms into powerful beam of light
  45. Medieval urine wheel
  46. Electric Streetlight, 1881
  47. Anatomy of the bronchus and bronchial tubes
  48. Heart and lungs