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  1. Pachycephalosaurus
  2. Mission Santa Ynez or Ines, Solvang, California
  3. Conceptual image of chromosome
  4. Abstract Alphabet
  5. Definition of anthropology
  6. Joachim Murat Reviews a Company of Black Soldiers in Koenigsberg
  7. Artillery drill in fort during the American Civil War
  8. 'London', plate 38 from 'Songs of Experience', 1794
  9. That Dam Cloud
  10. Old Mother Hubbard, from Old Mother Goose's Rhymes and Tales
  11. Conceptual image of human lungs and rib cage
  12. Humpty Dumpty
  13. The Man and the Alembic
  14. Human bones
  15. x-ray of head
  16. Comet of 1811, 19th century artwork
  17. Microscopic view of plant tissues
  18. Volcanoes - USGS Earth as Art
  19. Ceratosaurus
  20. Conceptual image of DNA
  21. Conceptual image of influenza causing flu
  22. Conceptual image of DNA
  23. Portrait of Anton Chekhov (1860-1904) 1902
  24. Ida B. Wells, 1891
  25. The muscles of the hand
  26. Soybeans, early growth, Minnesota
  27. Human skeleton
  28. Battle of Waterloo, June 18, 1815, 3rd Grenadier of Guard commanded by Cambronne
  29. Skeleton Chart
  30. Vintage American history print of a younger President Theodore Roosevelt
  31. ABCs
  32. Women working in a munitions factory in 1915
  33. Apatosaurus
  34. Human Skin
  35. Artist's concept depicting the evolution of a lobe-finned fish to an amphibian
  36. Mankind in the Making
  37. 1980's UK Womans Weekly Magazine Cover
  38. Euoplocephalus
  39. Wanted poster for Jesse James
  40. Body Plans of Extinct Reptiles
  41. Royal Court of French King Francis I at the Castle of Blois
  42. A Black Soldier In the Union Army Leading A Supply Train, 1864
  43. School Days
  44. Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  45. Brachiosaurus
  46. Science classroom
  47. Detached blood clot, artwork
  48. Lifecycle of a Frog