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  1. Bullfrog
  2. Vintage Civil War print of President Abraham Lincoln and his cabinet
  3. RMS Titanic departing from Southanpton on her maiden voyage, April 5, 1912
  4. The Spider and the Fly, illustration from Aesop's Fables
  5. Molecule THC
  6. Proud to be an American I
  7. Vintage Civil War print of the Battle of Fredericksburg
  8. College Graduation Ceremony
  9. Muir Woods National Monument, California - John Muir Portrait: Retro Poster
  10. Artist's Rendering Of A Solar System
  11. Capitol From the Botanical Gardens
  12. Denver, Colorado, 1859
  13. Good Grades and Good Health Go Together - WPA Poster
  14. Lena Delta - USGS Earth as Art
  15. Roman Roads
  16. Molecule Peppermint
  17. Joan of Arc Re-Captures City of Beaugency From the British
  18. Molecule Milk
  19. Grammar Lesson
  20. The Moon
  21. Wheat Mower with Hat, Seen from Behind, by Vincent van Gogh, c. 1870-90
  22. Native Americans Bringing Furs To Dutch Traders
  23. Portrait Of Ida B. Wells Barnett, 1893
  24. Alice and The Cheshire Cat
  25. The Summer Road
  26. Oregon, Owyhee. Close-up of picture jasper stone
  27. The Outward Bound, 1912
  28. Minnesota - USGS State Mosaic
  29. A pair of Allosaurus dinosaurs explore the remains of a Diplodocus carcass
  30. Sierra de Velasco - USGS Earth as Art
  31. Antique Stock Certificate I
  32. Pneumonia Strikes like a Man Eating Shark - WPA Poster
  33. Venus
  34. On the deck of the Titanic
  35. Front page of The New York Times, 13 February 1945, reporting on the Yalta Conference
  36. Cross section image of human head
  37. Elastic artery cross-section, SEM
  38. Sense of Wonder
  39. The four terrestrial planets compared in scale
  40. Colorized image of HIV-infected H9 T-cell
  41. Arthritis of the hip, X-ray
  42. Knocking-off time at the Harland
  43. Normal hip, X-ray
  44. Be Creative
  45. The Transfiguration
  46. The Los Angeles Times announcing the end of World War I, 1918
  47. Annunciation to the Shepherds. Book of Hours of Leonor de la Vega. 1465-70
  48. Invertebrates