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  1. Conceptual image of chromosome
  2. Definition of anthropology
  3. Brachiosaurus
  4. Joan of Arc hears heavenly voices in the Forest
  5. Mission Santa Ynez or Ines, Solvang, California
  6. 'London', plate 38 from 'Songs of Experience', 1794
  7. Human bones
  8. That Dam Cloud
  9. Ida B. Wells, 1891
  10. Conceptual image of DNA
  11. The Man and the Alembic
  12. Ceratosaurus
  13. Microscopic view of plant tissues
  14. Conceptual image of DNA
  15. Comet of 1811, 19th century artwork
  16. Portrait of Anton Chekhov (1860-1904) 1902
  17. Conceptual image of influenza causing flu
  18. Conceptual image of human lungs and rib cage
  19. Shooting An Oil Well
  20. Joachim Murat Reviews a Company of Black Soldiers in Koenigsberg
  21. Old Mother Hubbard, from Old Mother Goose's Rhymes and Tales
  22. Humpty Dumpty
  23. The muscles of the hand
  24. Portrait of Henry Knox (1759-1806)
  25. Soybeans, early growth, Minnesota
  26. Human skeleton
  27. California - USGS State Mosaic
  28. Vintage American history print of a younger President Theodore Roosevelt
  29. Waziristan Hills - USGS Earth as Art
  30. Apatosaurus
  31. Women working in a munitions factory in 1915
  32. Battle of Waterloo, June 18, 1815, 3rd Grenadier of Guard commanded by Cambronne
  33. Mankind in the Making
  34. 1980's UK Womans Weekly Magazine Cover
  35. ABCs
  36. Euoplocephalus
  37. Human Skin
  38. Science classroom
  39. Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  40. School Days
  41. Body Plans of Extinct Reptiles
  42. Chalkboard with greetings written in English, French and German
  43. Lifecycle of a Frog
  44. Royal Court of French King Francis I at the Castle of Blois
  45. Abstract Alphabet
  46. Abraham Lincoln
  47. Detached blood clot, artwork
  48. The arteries of the brain