The sketches of Da Vinci. Leonardo wrote most of his personal notes from right-to-left, with the letters also reversed, which is why it is called mirror writing. The most widely accepted theory is that, because he was left-handed, this style prevented him from smudging the ink as his hand moved across the page. This photo perfectly captures the genius of a man who saw no rigid boundary between the worlds of art and science. Can you decipher his writings?