In this programme, join neuroscientist Andre Fenton, computer scientist Rana El Kaliouby and mathematician Talithia Williams as they explore the frontiers of human knowledge. In this episode, they are joined by a group of specialists as they attempt to decode the vocalization of animals including blue whales, chimpanzees, arachnids, bats, and more. Also, meet Kanzi, a gorilla who understands lexigrams.