Development of Arabic numerals Atauriques in the Nasrid palace, Granada, Andalucia, Spain 1920s television system, diagram Distillation, 16th century woodcut Legend of Archimedes and the lever Medieval urine wheel Rainhill Trials steam trains, 1829 Paracelsus and the Basel tribunal 19th Century electrical equipment Medical zodiac, 15th century diagram Durer's Celestial Globe, 1515 Phonetic Egyptian hieroglyphs Sets of fingerprints High-pressure steam engine, 19th century Table from Becher's 'Opuscula chymica' The Earth's seasons Organic tomatoes Standard electrical circuit symbols Measuring electric current Measuring electric voltage Durer's world map, 1515 Red kite, historical artwork Galileo using a telescope Little stint, historical artwork Muscles of lower leg Detail of 16th century map of Liguria Early video phone system, 1930 Hughes' printing telegraph Sir Isaac Newton, British physicist Shoveler duck, historical artwork Carboniferous landscape 14th century theological cosmography Galen lecturing on anatomy in Rome Medieval physician and pharmacist Early electric train Telegraph Key (Morse Code) Type J-37 Sir Walter Raleigh , English explorer Steam-powered coach, 1829 Detail of 16th century map of Liguria Heron/Hero of Alexandria, mathematician Torso bones Zenobe Gramme Grey phalarope, historical artwork Orbit of the Earth The four humours, diagram Mappa Mundi by La Cosa in 1500 Brain anatomy Tawny owl, historical artwork Page 1 Page 3