Leonardo da Vinci's submarine designs

Model of the submarine, exhibited at the Denver Museum of Nature and History. Photo by C. Edward Davis.

Lord Leonardo Da Vinci, at the head of his soldiers, cried out to him: ‘Surrender within four hours or you will be sunk!’ Yet after four hours, the said lord, the Great Turk not having accepted to surrender, sunk his galleys without the latter’s realizing how!

Model of the submarine, exhibited at the Denver Museum of Nature and History. Photo by C. Edward Davis.

Webbed glove, life ring and breathing apparatus.