Egyptian and Assyrian counting systems Native American census roll, artwork Sympathetic nerves, upper body 19th Century Electric Telegraph Equipment Carboniferous landscape Orbit of the Earth Splitting of wood log Johannes Kepler and Tycho Brahe Early video phone system, 1930 19th Century electrical equipment Steam-powered coach, 1829 Detail of 16th century map of Liguria Muscles of lower leg Muscles of the hand and forearm Spinal bones and ligaments Zenobe Gramme Brain anatomy Legend of Archimedes and the lever Sets of fingerprints Bees Table from Becher's 'Opuscula chymica' Sandpiper, historical artwork Water wheel Paracelsus and the Basel tribunal Snow crystals Galen's spirit system Lamps connected in series Torso bones Organic tomatoes 15th century surgical equipment, artwork Measuring electric current The Earth's seasons Durer's world map, 1515 Arabic science timeline Medieval urine wheel Medieval physician and pharmacist Lower leg bones and ligaments Villa Torrigiani, Camigliano village, Lucca, Tuscany, Italy Africa, 16th century Spanish map Muscles of the back High-pressure steam engine, 19th century Hummingbirds, historical artwork Shoveler duck, historical artwork Page 1 Page 2