In 2015, wildlife filmmaker Tom Mustill was whale watching when a humpback breached onto his kayak and nearly killed him.Tom became obsessed with trying to find out what the whale had been thinking. He wished he could just ask it. In the process of making a film about his experience, he discovered that might not be such a crazy idea. Developments in natural science and AI mean that we are closer than ever to genuinely talking to animals. Scientists and start-ups across Silicon Valley and beyond are working to turn the fantasy of Dr Doolittle into a reality, using powerful new technologies to try to decode the languages of animals. Whales, with their giant mammalian brains and sophisticated languages, offer one of the most realistic opportunities for us to do so. But what would the consequences of such human-animal interaction be? We’d open a Pandora’s Box that could never be closed.