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  1. Yutyrannus huali is a feathered tyrannosauroid from the Early Cretacous of China
  2. Pipes at Nesjavellir Geothermal Power Plant, Iceland
  3. Teacher Truths VII-Rewarding
  4. Vintage World War I poster of an ambulance being pulled by Pegasus
  5. Puerto Rico - USGS State Mosaic
  6. Vintage Civil War poster of the Battle of Missionary Ridge
  7. Back to School
  8. The human body with superimposed colored plates by Julien Bougle
  9. The Dancing Academy. Illustration for Sketches by Boz by Charles Dickens
  10. Vintage World War II poster featuring a fedora and an Army helmet
  11. Mineralogie I
  12. First Moon Men, Conceptual Art
  13. Virginia - USGS State Mosaic
  14. Timberman
  15. Nebraska - USGS State Mosaic
  16. Cross section biomedical illustration of pulp and root abscess in molar
  17. Manners and Lessons, from 'Through the Looking Glass' by Lewis Carroll
  18. The Town Mouse and the Country Mouse, La Fontaine's Fables
  19. The Discovery Of Nat Turner
  20. A herd of Brachiosaurus travel near a canyon mountain
  21. Abacus.
  22. Girl looking over stack of books
  23. Smilodon sabertooth mother and her cubs
  24. Lake Disappointment - USGS Earth as Art
  25. Fountain Pen
  26. Nikola Tesla
  27. The Dardzha Monster - USGS Earth as Art
  28. Carte De Visite Of Edmonia Lewis, 1870
  29. The Swedish Warship Vasa
  30. Dinosaur Skeleton, 1921
  31. Molecule Testosterone
  32. The American University, Beirut, Lebanon
  33. Santa Fe, NM, Wagon Train
  34. Malaspina Glacier - USGS Earth as Art
  35. Vintage World War II poster featuring a fighter plane and a ship patrolling the sea
  36. Human Skeleton: Lateral view in Crouching Posture
  37. On The Dark Road. Illustration From The Charles Dickens Novel Dombey And Son
  38. Algerian Sahara - USGS Earth as Art
  39. Arthritis of the neck, X-ray
  40. Anatomy of male muscular system, front view
  41. Karman Vortices - USGS Earth as Art
  42. Detail of hieroglyphic writing. Museum of Fine Arts. Budapest. Hungary
  43. Richelieu celebrating Mass at the Camp of La Rochelle before the Army
  44. Illinois - USGS State Mosaic
  45. Colorado - USGS State Mosaic
  46. Running On The Wind
  47. A Scientist In A Lab
  48. Giant Panda