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  1. Love Birds
  2. Bare-knuckle Boxers
  3. Carboniferous landscape
  4. Salt dissolution, artwork
  5. Lung bronchioles
  6. Clouds forming the shape of Earth's continents
  7. Lungs
  8. Viral throat infection, artwork
  9. Sierre to Zinal Mountain Race, The Finish 2012
  10. Carrigogunnell Castle, Near Limerick, County Limerick, Ireland
  11. Platelet, artwork
  12. Killdeer
  13. Artwork of Mars Polar Lander descending onto Mars
  14. 19th Century internal combustion engine
  15. Construction of the Pyramids
  16. Ichthyosaur and prey
  17. Rhodopsin protein molecule
  18. Durer's world map, 1515
  19. Composite image of the phases of the Moon
  20. Chinese armada, artwork
  21. TEEN Flutter of Love
  22. Vintage Golden Gate
  23. Cabeza De Vaca Expedition
  24. 'How vain are all your triumphs past', 1814
  25. sports car with high speed
  26. Sound Wave 2
  27. Walleye on Map
  28. Armillary sphere, 18th Century artwork
  29. Magnetic field
  30. Instruments for removing bladder stones
  31. Snap!
  32. Detail of 16th century map of Liguria
  33. Leptin molecule
  34. Steamboats on the Mississippi
  35. Wooded Path II
  36. Neanderthals hunt a cave bear
  37. Triceratops
  38. Famous places and monuments of the world
  39. Environs Of Paris 1
  40. Ballina, County Mayo, from 'Scenery and Antiquities of Ireland'
  41. City Of Golden Dreams - Contemporary Cityscape Painting
  42. Early electric train
  43. Zebra and Butterflies
  44. Woolly mammoths
  45. Early stromatolites, artwork
  46. Alveoli
  47. Protein tyrosine phosphatase molecule
  48. Construction of the DH.98 Mosquito fighter-bomber of World War II