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