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  1. Swirling oils show molecular properties
  2. Eye exam chart
  3. Planets' internal structures
  4. Pills being poured into a bottle after counting
  5. Male skeleton, computer artwork.
  6. Coloured SEM of human embryo at the 4-cell stage
  7. Scanning electron micrograph of just-divided HeLa cells
  8. Respiratory tract, artwork
  9. Spirogyra algae, light micrograph
  10. Kepler Mission rocket launch
  11. Artwork of a Tyrannosaurus rex dinosaur
  12. The muscles of the hand
  13. Microscopic view of inner nervous system
  14. Heel skin tissue, light micrograph
  15. Dental equipment
  16. A herd of Brachiosaurus travel near a canyon mountain
  17. Magnetic field
  18. View of Darwin's desk at Down House
  19. A Relative II
  20. The bones of the lower back
  21. Human brain anatomy, artwork
  22. Pachycephalosaurus
  23. Megatherium, Extinct Ground Sloth
  24. Homo floresiensis
  25. Dragonflies, 17th century artwork
  26. Triceratops
  27. Losh and Stephenson's carriage
  28. Kidney glomeruli, SEM
  29. Arm anatomy, historical artwork
  30. The Cygnus spacecraft begins its separation from the International Space Station
  31. General colon anatomy, with labels
  32. Skin surface, SEM
  33. Allosaurus
  34. Paper chromatograms of various dyes
  35. Refraction of light by bi-concave lens
  36. Muscles of the hand and forearm
  37. A Herd Of Centrosaurus Dinosaurs
  38. Bacteria infecting a macrophage, SEM
  39. Farmers Wanted for Survival on Mars
  40. Used interdental brush, SEM
  41. Thyroid gland. endocrine system
  42. Antihistamine drug crystals, SEM
  43. Ratcliffe Power Station
  44. The bones of the foot
  45. Steroid use, conceptual image
  46. Earth at time of Pangea
  47. TEM of Bordetella pertussis bacteria
  48. Early astronomical spectroscopy