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  1. Stacked Agate I
  2. Watercolor Agate I
  3. Agate Geode I
  4. Agate Studies IV
  5. Earth Agate E
  6. Oregon, Owyhee River Valley. Close-up of Morrisonite Jasper
  7. Flatboat, 19th Century
  8. The Planets, excluding Pluto
  9. Titanic survivors in lifeboat
  10. The Sinking of the Laconia in 1942
  11. Frank Whittle's early development of the jet engine
  12. Purple Watercolor Agate I
  13. Superior view of human brain with colored lobes and labels
  14. Vitruvian Skeleton
  15. Von Karman Vortices - USGS Earth as Art
  16. Map Of the Battle Of Gettysburg, 1863
  17. Pi to 2198 decimal place
  18. The bones of the jaw
  19. Bullfrog
  20. In With the Horse Herd
  21. Molecule Chili
  22. Vintage Civil War print of President Abraham Lincoln and his cabinet
  23. RMS Titanic departing from Southanpton on her maiden voyage, April 5, 1912
  24. Portrait of Andrew Jackson
  25. Nikola Tesla With Machine
  26. Desert to Forest - USGS Earth as Art
  27. Book
  28. Edwin Hubble's Galaxy Classification System
  29. Modern Comanche, 1891
  30. Unfinished Portrait of Napoleon I formerly attributed to Jacques Louis David 1808
  31. The Heavens II
  32. Molecule Water
  33. The Two Rats, Fox, and Egg, La Fontaine's Fables
  34. Relaxing feet.
  35. Muhammad Ali on the shore of the Congo River, Kinshasa, Zaire
  36. Young boy in school writing on chalkboard
  37. Christian Loses His Burden At The Cross. From The Book The Pilgrim's Progress
  38. Conceptual image of DNA
  39. Chinese acupuncture model
  40. College Graduation Ceremony
  41. Sunflower - Botanical Illustration
  42. No Man's Land - USGS Earth as Art
  43. Blood clot, SEM
  44. The bones of the head, neck and face
  45. Washing Gold, Calaveras, California, 1853
  46. Distance of Sun, Moon and Planets
  47. Civil War, Texas Rangers, 1861
  48. Bouncing ball