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  1. Passion flower pollen grain, SEM
  2. Brain inflammation, TEM
  3. STS-112 Mission
  4. Test Tube Experiment
  5. Coloured SEM of human embryo at the 2-cell stage
  6. Buckminsterfullerene molecule
  7. 15th century surgical equipment, artwork
  8. Blood samples
  9. Illustration of action potential of a nerve cell
  10. Illustration of muscle contraction
  11. Broadclub cuttlefish
  12. Close-Up of Molecular Structure Diagrams
  13. Microscopic view of virus
  14. Chemicals and rock samples in Darwin's study
  15. Build-up of atherosclerotic plaque in an artery
  16. Neck and facial nerves
  17. Acupuncture model
  18. Surgeon in operating room
  19. Solar cell
  20. Edrengiyn Nuruu - USGS Earth as Art
  21. Antibiotic mechanism of action, artwork
  22. AIDS pneumonia infection, TEM
  23. 19th-century mining machine
  24. Anthrax bacteria
  25. Herceptin breast cancer drug molecule
  26. 1812 Egyptian Ibis
  27. Artist's impression of Tyrannosaurus rex
  28. Human tongue surface, SEM
  29. Human immune response, artwork
  30. Anatomy of human eye
  31. Robot picking bacteria containing human DNA
  32. Di(2-ethylhexyl) phthalate
  33. Group of Escherichia coli bacteria cells, known as E. Coli
  34. Antibiotic acting on bacteria
  35. Blood vessel anatomy
  36. Digestive system, artwork
  37. Oscilloscope trace
  38. Pollen grains, SEM
  39. Diamond structure
  40. Bone death, artwork
  41. Fallopian tube, SEM
  42. Bacteria infecting a macrophage, SEM
  43. Alveoli
  44. Blood samples
  45. Cephalopd eye, artwork
  46. Studio shot of hand holding test tube with liquid
  47. Genetic research
  48. Pantometer, 16th Century