The 10 Best Ideas of Leonardo Da Vinci

Da Vinci helped revolutionize science. And sometimes he just dreamed up fanciful concepts. Always, he thought in ways no one else had. 10. Mirror Writing Was it a ploy to thwart Renaissance copycats peeking at his notes, or just a way to avoid the inky mess of writing left-handed? Whatever his motives, Da Vinci sure liked mirror writing: most of his journals are