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  1. Conceptual image of DNA
  2. Anterior view and sagittal view of male urinary bladder
  3. Conceptual image of influenza causing flu
  4. The Man and the Alembic
  5. Comet of 1811, 19th century artwork
  6. The muscles of the hand
  7. Shooting An Oil Well
  8. Sulaiman Mountains - USGS Earth as Art
  9. Soybeans, early growth, Minnesota
  10. Che Guevara
  11. Aleutian Clouds - USGS Earth as Art
  12. Portrait of Anton Chekhov (1860-1904) 1902
  13. Microscopic view of plant tissues
  14. Human skeleton
  15. Humpty Dumpty
  16. Portrait of Henry Knox (1759-1806)
  17. Jack Johnson former heavyweight champion in Paris April 4, 1933
  18. Vintage American history print of a younger President Theodore Roosevelt
  19. Apatosaurus
  20. Joachim Murat Reviews a Company of Black Soldiers in Koenigsberg
  21. Mankind in the Making
  22. California - USGS State Mosaic
  23. Women working in a munitions factory in 1915
  24. Euoplocephalus
  25. Science classroom
  26. ABCs
  27. Chalkboard with greetings written in English, French and German
  28. Body Plans of Extinct Reptiles
  29. Oil drilling rigs out in the ocean with a view of the coastline, Invergordon, Scotland
  30. School Days
  31. Missouri - USGS State Mosaic
  32. Lady Bell Plant Pollen
  33. Battle of Waterloo, June 18, 1815, 3rd Grenadier of Guard commanded by Cambronne
  34. A Black Soldier In the Union Army Leading A Supply Train, 1864
  35. The arteries of the brain
  36. Human Skin
  37. Lifecycle of a Frog
  38. Detached blood clot, artwork
  39. Oklahoma - USGS State Mosaic
  40. Chinese compass, 18th century manuscript
  41. Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  42. Portrait of Henry Clay (1777-1852)
  43. Human nervous system, computer artwork.
  44. Empty Quarter - USGS Earth as Art
  45. Artist's concept depicting the evolution of a lobe-finned fish to an amphibian
  46. Ohio - USGS State Mosaic
  47. Abraham Lincoln
  48. To the Jews, plate 27 from Jerusalem, 1804-20