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  1. Development of Arabic numerals
  2. Galen lecturing on anatomy in Rome
  3. High-pressure steam engine, 19th century
  4. Detail of 16th century map of Liguria
  5. Four Horsemen of the Apocalypse
  6. 1920s television system, diagram
  7. Phrenology chart
  8. Early electric lamps
  9. Torso bones
  10. Shoveler duck, historical artwork
  11. Iron pyrites
  12. Orbit of the Earth
  13. Muscles of lower leg
  14. Distillation, 16th century woodcut
  15. Medieval urine wheel
  16. Steam-powered coach, 1829
  17. Apollonius of Perga, Greek mathematician
  18. Standard electrical circuit symbols
  19. Phonetic Egyptian hieroglyphs
  20. Sir Isaac Newton, British physicist
  21. Arabic science timeline
  22. Early radiography experiment
  23. 16th century map of Sardinia cartouche
  24. Brain anatomy
  25. Spinal bones and ligaments
  26. Perpetual motion machine, 19th century
  27. The Earth's seasons
  28. Dioscorides, Ancient Greek physician
  29. Cuneiform script
  30. Snow crystals
  31. Legend of Archimedes and the lever
  32. 14th century theological cosmography
  33. Ear anatomy
  34. Hughes' printing telegraph
  35. Boring a hole
  36. Early video phone system, 1930
  37. Splitting of wood log
  38. Carboniferous landscape
  39. Grey phalarope, historical artwork
  40. Medical zodiac, 15th century diagram
  41. Foot bones and ligaments
  42. Atauriques in the Nasrid palace, Granada, Andalucia, Spain
  43. Durer's world map, 1515
  44. Detail of 16th century map of Liguria
  45. Early electric train
  46. Mendelian inheritance
  47. Sets of fingerprints
  48. Heron/Hero of Alexandria, mathematician