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  1. Portrait of Ulysses S. Grant (1822-85)
  2. Siberian Ribbons - USGS Earth as Art
  3. Abraham Lincoln, 1809
  4. Civil War print of Union cavalry soldiers charging a Confederate firing line
  5. George Washington, by Gilbert Stuart, 1821
  6. Andalgalornis steulleti, a flightless predatory bird
  7. Mercury
  8. Minnesota - USGS State Mosaic
  9. Mushroom Chart II
  10. History Of Power
  11. Conceptual image of DNA
  12. Earth
  13. Richat Structure - USGS Earth as Art
  14. Idaho - USGS State Mosaic
  15. A simplified Herzprung Russell Diagram showing how stars are classified
  16. Heather - Botanical Illustration
  17. Vintage American History print of General George Washington at The Battle of Trenton
  18. Knight's armor
  19. Pencils
  20. A pair of Allosaurus dinosaurs explore the remains of a Diplodocus carcass
  21. Drafting the Declaration of Independence, 28th June 1776, detail of Thomas Jefferson
  22. Capture and Death of Sitting Bull Lithograph
  23. The Outward Bound, 1912
  24. Paris at Thermopylae
  25. Vintage Civil War print featuring the Battle of Gettysburg
  26. Blood cells in blood vessel, artwork
  27. George And Martha Washington At Presidential Reception
  28. Ferdinand Magellan (1480-1521) on discovering the Pacific Ocean
  29. Brain antomy, 19th century artwork
  30. Strength In Numbers
  31. Wisconsin - USGS State Mosaic
  32. Travels Around the World
  33. Normal spine, X-ray
  34. Oil well pump jacks at Bakken Oil Field near Estevan, Saskatchewan, Canada
  35. Pneumonia Strikes like a Man Eating Shark - WPA Poster
  36. Women's Rights Parade, 1917
  37. Sierra de Velasco - USGS Earth as Art
  38. The Birth of Rostam by Caesarean. Shahnameh. The Book of Kings. 16th c. Persian Art
  39. The Presidents Educational Poster, 2017
  40. Antique Stock Certificate I
  41. If I Were A Cloud
  42. Alternating Motor - Blue
  43. Orbits of Earth Crossing Asteroids
  44. Knights charging into battle
  45. RMS Titanic during fitting out, 01 January 1912
  46. Mark Twain , 1901
  47. 'Nurse's Song,' plate 18 from 'Songs of Innocence,' 1789
  48. Full on view of a Woolly Mammoth