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  1. Mars
  2. Superior view of human brain with colored lobes and labels
  3. Famous prehistoric rock paintings of Tassili N'Ajjer, Algeria
  4. A Mad Teaparty By Charles Folkard
  5. Arthritis of the knee, X-ray
  6. Stethoscope
  7. Agate Studies IV
  8. Vintage Civil War print of Abraham Lincoln riding on horseback as a crowd cheers
  9. Space Suit
  10. Bright Periodic Table - White, Modern Text
  11. Lena Delta - USGS Earth as Art
  12. South American Independence
  13. Colon blood vessels, light micrograph
  14. Sir John Hawkins (1532-95)
  15. Molecule Chili
  16. Apache Men, c1906
  17. A composite showing different stages of the 2010 solstice total moon eclipse
  18. Flatboat, 19th Century
  19. Spatial dimensions, conceptual artwork
  20. Ball Play Of the Choctaw, 1840s
  21. Blackfoot Native American
  22. Photograph of logarithmic slide rule
  23. Vitruvian Skeleton
  24. Solar System (Colored)
  25. The Planets, excluding Pluto
  26. Indigo Agate C
  27. Map Of the Battle Of Gettysburg, 1863
  28. Austenaco, Great Warrior, Commander in Chief of the Cherokee Nation
  29. The Quack Frog, illustration from Aesop's Fables
  30. Watercolor Agate I
  31. Living Relatives of Dinoaurs
  32. The Rainforest
  33. Portrait Of Harriet Tubman, 1868-69
  34. Edwin Hubble's Galaxy Classification System
  35. Study of the Human Figure, Lateral View
  36. Van Gogh from Space - USGS Earth as Art
  37. Agate Geode I
  38. General Curtis LeMay and President Kennedy
  39. The Sinking of the Laconia in 1942
  40. Titanic survivors in lifeboat
  41. Frank Whittle's early development of the jet engine
  42. Mississippi River Delta - USGS Earth as Art
  43. Houdini Diver Suit
  44. RMS Titanic departing from Southanpton on her maiden voyage, April 5, 1912
  45. Decorative Lintel from the ancient Mayan city of Yaxchilan, Chiapas, Mexico
  46. Desk Tools I
  47. Poe
  48. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper