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  1. Solar System Educational Poster
  2. President John F. Kennedy and the First Lady in front of White House
  3. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  4. Modern Geode I
  5. The First Meeting Of Washington And Lafayette In Philadelphia, August 3rd 1777
  6. Tiny Engineers Fixing a Broken Chip on a Motherboard
  7. Microphone
  8. The Quack Frog, illustration from Aesop's Fables
  9. Humpty Dumpty Book Artwork
  10. Plum Agate B
  11. Vintage Parchment Tesla Electric Generator Poster
  12. Serotonin neurotransmitter molecule
  13. School Time, 1874, American painting
  14. Stethoscope
  15. Normal neck, X-ray
  16. Obama: Believe
  17. James Madison, by Gilbert Stuart , 1821
  18. Indigo Planetary Chart
  19. From The Original Manuscript Of Oliver Twist By Charles Dickens, Published 1896
  20. Close Ups Of Fortification On Crazy Lace Agate
  21. Neptune
  22. Vintage Civil War poster of the Battle of Missionary Ridge
  23. Faded Blueprint 3 1/2 Inch Floppy Disk Patent Poster
  24. The Slaughter on the Somme, WWI
  25. Elizabeth of Bourbon (1603-1644). Queen of Spain. Alcazar Castle, Segovia, Spain
  26. Composite of 90 different species of parrots
  27. Illustration From The Faerie Queene By Walter Crane 1845-1915 English Artist
  28. Normal spine, X-ray
  29. Vintage Parchment Stethoscope Patent Poster
  30. The Nina, Pinta, And Santa Maria
  31. Lincoln's Gettysburg Address
  32. Wright Flyer sculpture at Wright Brothers National Memorial, North Carolina
  33. Bodmer, Blackfoot Horseman
  34. Oil rig in the savannah of Wyoming
  35. Ball Play Of the Choctaw, 1840s
  36. Sioux Encampment, 1832
  37. Vintage Parchment Syringe Patent Poster
  38. Grey Agate E
  39. Apple Tree - Botanical Illustration
  40. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  41. Oregon. Close-up of Graveyard Point Plume Agate stone
  42. The Washington Family, by Edward Savage, c.1789-96
  43. Austenaco, Great Warrior, Commander in Chief of the Cherokee Nation
  44. Tlazolteotl and Chalchiuhtlicue, Aztec Goddesses of Love and Water. 15th c. Codex Cospi
  45. Sitting Bull - Lakota Sioux Tribe Chief, 1884
  46. Vintage Civil War Print of the Battle of Five Forks
  47. Pencils
  48. Navajo weavers, c.1914