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  1. Joan of Arc hears heavenly voices in the Forest
  2. President Kennedy greets Peace Corps Volunteers on the White House South Lawn
  3. Artillery drill in fort during the American Civil War
  4. Conceptual image of chromosome
  5. Mission Santa Ynez or Ines, Solvang, California
  6. Brachiosaurus
  7. 'London', plate 38 from 'Songs of Experience', 1794
  8. Human bones
  9. That Dam Cloud
  10. Ida B. Wells, 1891
  11. Conceptual image of DNA
  12. Conceptual image of DNA
  13. The Man and the Alembic
  14. Comet of 1811, 19th century artwork
  15. The muscles of the hand
  16. Portrait of Anton Chekhov (1860-1904) 1902
  17. Conceptual image of influenza causing flu
  18. Ceratosaurus
  19. Soybeans, early growth, Minnesota
  20. Microscopic view of plant tissues
  21. Conceptual image of human lungs and rib cage
  22. Joachim Murat Reviews a Company of Black Soldiers in Koenigsberg
  23. Old Mother Hubbard, from Old Mother Goose's Rhymes and Tales
  24. Shooting An Oil Well
  25. Human skeleton
  26. Humpty Dumpty
  27. Portrait of Henry Knox (1759-1806)
  28. Vintage American history print of a younger President Theodore Roosevelt
  29. California - USGS State Mosaic
  30. Apatosaurus
  31. Women working in a munitions factory in 1915
  32. ABCs
  33. Waziristan Hills - USGS Earth as Art
  34. Euoplocephalus
  35. 1980's UK Womans Weekly Magazine Cover
  36. Mankind in the Making
  37. Science classroom
  38. Battle of Waterloo, June 18, 1815, 3rd Grenadier of Guard commanded by Cambronne
  39. Human Skin
  40. School Days
  41. Body Plans of Extinct Reptiles
  42. Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  43. Wanted poster for Jesse James
  44. Detached blood clot, artwork
  45. Chalkboard with greetings written in English, French and German
  46. The arteries of the brain
  47. A Black Soldier In the Union Army Leading A Supply Train, 1864
  48. Lady Bell Plant Pollen