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  1. Conceptual image of human backbone
  2. Human skull with teeth, computer artwork
  3. Coloured X-ray of a 17-jewel wrist-watch
  4. Common Dolphins
  5. DNA
  6. The analysis of sound frequencies by the basilar membrane.
  7. Scanning electron micrograph of HIV particles infecting a human T cell
  8. Sickle cell anaemia
  9. Universal indicator scale
  10. 19th Century internal combustion engine
  11. A Pair Of Carnotaurus Dinosaurs Chasing A Group Of Gasparinisaura
  12. Electromagnetic spectrum
  13. The human body with superimposed colored plates by Julien Bougle
  14. Sierra de Velasco - USGS Earth as Art
  15. The nerve supply of the trunk
  16. Photomicroscopic close up of a snowflake crystal
  17. Desert to Forest - USGS Earth as Art
  18. Bacteria infecting a macrophage, SEM
  19. Mixing Potions
  20. First Atom Bomb Test Site
  21. Bismuth crystal
  22. 1920s television system, diagram
  23. Conceptual image of DNA
  24. Leukemia cells, TEM
  25. Mineralogie I
  26. Thomas Edison, US inventor
  27. 3D rendering of a Velociraptor dinosaur skeleton, side view
  28. Cardiac muscle, SEM
  29. Insulin Crystals, Light Micrograph
  30. Molecule Ethanol
  31. Homeric cosmogony
  32. Fahrenheit Wind Chill Chart
  33. HaCaT culture cells, light micrograph
  34. Lavoisier equipment, 1787
  35. Base of human skull, inferior view, with labels
  36. DNA nucleotides, artwork
  37. Molecule Peppermint
  38. Sun and its planets
  39. Electronics Illustrated, March
  40. Tyrannosaurus rex
  41. Crystal
  42. Keyboard Keys
  43. The Apothecary or, The Chemist
  44. Muscles used in cycling, 19th century
  45. Richat Structure - USGS Earth as Art
  46. The bones of the head, neck and face
  47. Arthritis of the hip, X-ray
  48. Healthy brain, MRI scans