Lamps connected in series Arm bones Organic tomatoes 15th century surgical equipment, artwork Anglo-Saxon 10th century world map Sir Walter Raleigh , English explorer Dioscorides, Ancient Greek physician Arabic science timeline Medieval urine wheel Four Horsemen of the Apocalypse Francesco Sforza, military leader 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 Egyptian and Assyrian counting systems Native American census roll, artwork Detail of 16th century map of Liguria Villa Torrigiani, Camigliano village, Lucca, Tuscany, Italy, Europe Carboniferous landscape Orbit of the Earth Splitting of wood log Durer's world map, 1515 Medieval physician and pharmacist 19th Century electrical equipment Steam-powered coach, 1829 Heron/Hero of Alexandria, mathematician Lower leg bones and ligaments Sympathetic nerves, upper body Brain anatomy, 16th century diagram Medical zodiac, 15th century diagram Skull anatomy Grey phalarope, historical artwork Rainbow optics, historical artwork Brain anatomy Lamps connected in parallel Sets of fingerprints Bees Table from Becher's 'Opuscula chymica' Sandpiper, historical artwork Water wheel Page 1 Page 2