Leonardo Da Vinci

I am watching a BBC documentary on Leonardo Da Vinci and The Secret Life of Mona Lisa. Leonardo is the greatest scientist, artist, engineer, inventor and naturalist alive. He keep prodigious notes with detailed and intricate drawings of human forms, dissections, flying machines, and other subjects. He is a self-taught polymath. My sons, B1 and B3 sat in front of the tv to join me in learning more about Leonardo Da Vinci.