New documentary from Sarah, Ken Burns dives deep into remarkable world of Leonardo da Vinci
Ken Burns added: "He's an anatomist, and he's a botanist, and he's interested in flight, and he's a sculptor, and he's a painter, and he's an artist, and he's all of those. The reason why it's such a good story is that he was interested in knowing everything." Among da Vinci's creations: a glass model of the human heart.