But how close are their minds to ours In the Bahamas,Professor Denise Herzing believes she is very close to an answer,theorising that she will be able to hold a conversation with wilddolphins in their own language within five years. In Western Australia,dolphins rely on their versatile and inventive brains to survive in amarine desert. In Alaska, humpback whales gather into alliances in whichindividuals pool their specialised talents to increase their huntingsuccess. We discover how young spotted dolphins learn their individualnames and the social etiquette of their pod, and how being curious aboutnew objects leads Caribbean bottlenose dolphins to self-awareness andeven to self-obsession. Finally, the film shows a remarkable group ofMexican grey whales, who seem able to empathize with humans and mayeven, have a concept of forgiveness.