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  1. Sycamore leaf bud, light micrograph
  2. Pipes at Nesjavellir Geothermal Power Plant, Iceland
  3. Artwork: brain frontal areas that control the body
  4. Antibiotic research
  5. Brontotherium, a family of extinct mammals
  6. Boring a hole
  7. Doctor examining MRI scans
  8. Orlan spacesuit gloves
  9. Barreal Blanco - USGS Earth as Art
  10. E. coli bacteria
  11. Semicircular canal, diagram
  12. Fludd's wind diagram
  13. Skull anatomy
  14. Nerve cell, computer artwork
  15. Group of H5N1 virus with glassy view
  16. DNA autoradiogram
  17. Growth hormone receptor, molecular model
  18. Eden Project
  19. Viral dUTPase enzyme, molecular model
  20. Sleeping sickness parasite
  21. Craniofacial surgery approaches
  22. Nerve synapse
  23. Computer model of a molecule of vanillin
  24. Can evacuated by vacuum pump
  25. Artwork of intestinal hookworm causing anaemia
  26. Homo antecessor
  27. Fire plumes, computer simulation
  28. Foot bones and ligaments
  29. Artwork of eye
  30. Arachnid anatomy, artwork
  31. Engraving of the Bullock Rotary Press of 1865
  32. Radiologists examining an X-ray
  33. Narrowed coronary artery, artwork
  34. 5f electron orbitals, cubic set
  35. Retina with neovascularization
  36. Human evolution
  37. Tomato plant
  38. Doctor's stethoscope
  39. Flower pistil
  40. Pollinated flower pistil, SEM
  41. Transverse section of the midbrain
  42. Cochlea cells, SEM
  43. Retina of a normal eye
  44. Bromine diffusion
  45. Group 2 metals
  46. Early Earth, artwork
  47. Tongue anatomy
  48. Molecular structure