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  1. Shooting An Oil Well
  2. Normal wrist, X-ray.
  3. Idaho - USGS State Mosaic
  4. 19th Century electrical equipment
  5. Star trails and bioluminescence, Gippsland Lakes, Australia
  6. Running On The Wind
  7. Global Circulation Patterns Diagram
  8. Bees - Vintage Educational Poster
  9. Male reproductive system, artwork
  10. Heart anatomy, 18th century
  11. Blood types, conceptual image
  12. Bogda Mountains - USGS Earth as Art
  13. Artwork of Caudipteryx sp., a bird-like dinosaur
  14. Oklahoma - USGS State Mosaic
  15. Donati's Comet of 1858, artwork
  16. Diphtheria treatment, artwork
  17. Forensic evidence
  18. Geography of the Heavens VI
  19. Human spine, side view
  20. Stem cell, conceptual artwork
  21. Scanning electron micrograph of an apoptotic HeLa cell
  22. Explorer 1
  23. Ice Stars - USGS Earth as Art
  24. Astronomical Chart I
  25. Patent--Sewing Machine
  26. Cretaceous dinosaurs
  27. Computer memory chips
  28. Sets of fingerprints
  29. Conceptual image of platelets with red blood cells
  30. Pollen grains, SEM
  31. Microscopic view of DNA
  32. Anterior view and sagittal view of female urinary bladder
  33. Oregon, Owyhee. Close-up of picture jasper stone
  34. The analysis of sound frequencies by the basilar membrane
  35. Sea salt, SEM
  36. Instruments for removing bladder stones
  37. Confidence of Alexander the Great into his physician Philippos, 1870
  38. Shame may be Fatal - WPA Poster
  39. Geranium (Pelargonium sp.) leaves
  40. Minnesota - USGS State Mosaic
  41. Dragon Lake - USGS Earth as Art
  42. Male muscle anatomy of the human back
  43. Calcium phosphate crystal, SEM
  44. View looking from inside the mouth while at the dentist
  45. Oregon. Close-up of Owyhee Picture Jasper stone
  46. Vermont - USGS State Mosaic
  47. The increase in hominid cranial capacity over time
  48. Artwork of drug transmission to brain nerve cell