We have all seen animal trainers manage to get different animals perform very difficult and complex tasks through training. One of the tools they use to achieve this level of communication with the animals is a clicker (though a short-tone whistle is also used). The point of the clicker is to help the animal map the expected action in their brains when the click is perceived. In a recent episode of Hidden Brain, the origins of this training method, and its potential were explored. At our core, we...