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