Grey phalarope, historical artwork Rainbow optics, historical artwork The four humours, diagram Galileo Golden eagle, historical artwork Paracelsus and the Basel tribunal Early electric train Early video phone system, 1930 Conrad Gessner's nature collection Snow crystals 19th century chart of ocean currents Little stint, historical artwork Early astronomical spectroscopy 19th-century mining machine Telegraph Key (Morse Code) Type J-37 Rainhill Trials steam trains, 1829 Triger's caisson, 19th century Lamps connected in series Cuneiform script Neolithic hunters 14th century theological cosmography Galileo using a telescope Distillation, 16th century woodcut Acoustic echo Young hare, by Durer Arm bones Tawny owl, historical artwork Organic tomatoes 19th Century Electric Telegraph Equipment 15th century surgical equipment, artwork Detail of 16th century map of Liguria Table from Becher's 'Opuscula chymica' Galen's spirit system Torso bones Measuring electric current The Earth's seasons Brain anatomy Atauriques in the Nasrid palace, Granada, Andalucia, Spain Sets of fingerprints Bees Detail of 16th century map of Liguria Sandpiper, historical artwork Water wheel Page 1 Page 2