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  1. Microbiology laboratory
  2. Coahuila, Mexico - USGS Earth as Art
  3. HaCaT culture cells, light micrograph
  4. Leaf pores, SEM
  5. Oscilloscope trace
  6. The Cygnus spacecraft begins its separation from the International Space Station
  7. Artwork showing the history of our Universe
  8. Conceptual image of plasmodium causing malaria
  9. Current melting steel wool
  10. Bilharzia infection, ureter tissue
  11. Carbon Nanotube, Artwork
  12. Edison talking into his phonograph
  13. Illustration showing the major coronary arteries
  14. Refraction of light by bi-concave lens
  15. Space shuttle Discovery backdropped by Earth's horizon
  16. Prehistoric tree ferns, artwork
  17. Medical and laboratory shots
  18. Enterococcus faecalis bacteria, SEM
  19. Conceptual image of human tooth
  20. STS-135 Mission
  21. DNA analysis
  22. Trumpet worm
  23. Dental instruments
  24. Pelvis bones and ligaments
  25. Brain inflammation, TEM
  26. Leukaemia blood cells, SEM
  27. Robot loading DNA in automated genome mapping
  28. Washington - USGS State Mosaic
  29. Overbite, X-ray
  30. Skin cancer cell, SEM
  31. Pharmacist holding bottles of medication
  32. Stack of petri dishes with bacterial cultures
  33. Compsognathus
  34. Coloured SEM of a fertilized human egg (zygote)
  35. Dilophosaurus dinosaur skull
  36. Helicobacter pylori bacterium, TEM
  37. Illustration of a 32 day old human embryo
  38. Flame test on potassium
  39. Ground beetle head, SEM
  40. Toothache, conceptual artwork
  41. Muscles of the back
  42. Delaware - USGS State Mosaic
  43. Sperm production, SEM
  44. Brain surface anatomy, with labels
  45. Fingerprint analysis
  46. CD4 protein fragment, molecular model
  47. Woman holding ultrasonograph photo of baby
  48. Female reproductive organs