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