'What does the world look like from the moon$219' 'How do our bodies work$220' 'Is it possible for people to fly$221' 'Can I make a horse of bronze that is 8 metres tall$222' 'How can we have cleaner cities$223' All his life, Leonardo da Vinci asked questions. We know him as a great artist, but he was one of the great thinkers of all time, and even today, doctors and scientists are still learning from his ideas. Meet the man who made a robot lion, wrote backwards, and tried to win a war by moving a river . . .
