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  1. Great Auk (Pinguinus impennis), engraving
  2. Thomas Edison, US inventor
  3. Home to Roost
  4. Homo ergaster
  5. Indonesia, A morning scene from the famous 9th century Buddhist temple at Borobudur
  6. Armillary sphere, 18th Century artwork
  7. Early petrol locomotives
  8. Historical Proof Of Pythagoras' Theorem
  9. Three Flying Heron
  10. City ambulance, 19th century
  11. Cruising
  12. India, Madhya Pradesh, Chauragarh, nr Pachmarhi, Numerous tridents, or trishulas
  13. 1770 Cuvier Maastricht Mosasaur
  14. Yosemite National Park, California, Fresh snow on conifers along Merced River
  15. Just a dream
  16. Dawn Over Ullswater
  17. India, Rajasthan, Jaipur, Amer, The 16th century Amber Fort with a hot air balloon aloft
  18. Gregor Mendel, caricature
  19. Pill Bug (Armadillidium Vulgare), SEM
  20. Architectural Waves
  21. Indonesia, South Kalimatan, Banjarmasin, the banks of the Barito River
  22. Torso bones
  23. India, Rajasthan, Jaipur, Amer, Decorated elephants stride down the narrow paved road
  24. Gaulard transformer, 19th century
  25. Propeller cavitation
  26. Indonesia, Tanjung Puting National Park, A mother and baby Bornean Orangutan
  27. 1858 Prehistoric marine reptiles
  28. Mathematical diagrams, 17th century
  29. Wernher von Braun, German rocket designer
  30. Lines and Curves
  31. Geese Over The River
  32. Close-Up Of A Series Of Waterfalls, Soft Blur Of Flowing Water Over Black Rock, Iceland
  33. Vietnam, Ha Long Bay, Sunset among the two thousand limestone Karst islands
  34. Tesla's Wardenclyffe Tower Laboratory, 1900s
  35. Peru, Andes, Cordillera Vilcabamba, Nevado Salkantay At well over 6000m high
  36. John Knox, Scottish theologian
  37. Marconi radio apparatus
  38. Between Two Hearts
  39. Stonehenge, 17th century artwork
  40. Perpetual motion machine of von Kranach
  41. India, Rajasthan, Ranthambhore, A female Bengal tiger is greeted by one of her cubs
  42. Francesco Sforza, military leader
  43. Geometric Rhythm
  44. Shattered Geometry
  45. 1824 Buckland's Megalosaurus limb bones
  46. France, French Alps, Haute-Savoie, Chamonix, skiers in the Valle Blanche off piste
  47. Hipparchus, Ancient Greek astronomer
  48. Ford Model T Car