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  1. Entropy
  2. Bolts of electricity discharging in the lab of Nikola Tesla
  3. Constitution Document
  4. Sioux Chief Sitting Bull
  5. Solar System Background
  6. Painting of George Washington crossing the Delaware
  7. String Theory
  8. Native American Chiefs
  9. Tyrannosaurus Rex Study
  10. Signing the Declaration of Independence, 4th July 1776, c.1817
  11. Constitution Document - Articles 1-7
  12. Declaration Of Independence
  13. Painting of George Washington crossing the Delaware
  14. Agate Studies I
  15. Declaration of Independence Document
  16. United States Constitution - Horizontal
  17. Quantum Mechanics
  18. Vintage Civil War print of the Battle of Gettysburg
  19. Solar System 1
  20. Declaration Of Independence
  21. Alice In Wonderland
  22. Bright Periodic Table - Navy, Modern Text
  23. Habitable Zone
  24. United States Constitution
  25. Universal Gravitation
  26. The Bill Of Rights
  27. Rosie The Riveter vintage war poster from World War II
  28. Antique Periodic Table
  29. Antique Periodic Table - Classic Text
  30. The Titanic's propellers in the Thompson Graving Dock of Harland
  31. Sage Agate A
  32. Herb Chart on Black
  33. Revolutionary War Painting showing the surrender of British General John Burgoyne
  34. 1940's Trading In Progress On Floor Of New York Stock Exchange NYC USA
  35. Timeline of Life on Earth
  36. The Temple Scroll, From The Dead Sea Scrolls
  37. The Resignation of George Washington on 23rd December 1783, c.1822
  38. Sitting Bull, a Hunkpapa Lakota tribal chief
  39. Timeline of Dinosaurs
  40. The onboard gym on the Titanic showing the rowing machines and exercise bikes, 1912
  41. Zulu Warriors
  42. Strings II
  43. Native American Warrior
  44. Children Love the World
  45. Electromagnetic Induction
  46. Egyptian Papyrus
  47. Napoleon Bonaparte at the Royal Military School of Brienne
  48. Ancient Egyptian Art