Long-standing theories about how animals think are being overturned. Instead of simplistic attempts to rank animals through IQ, zoologists are exploring the animal mind on a much broader scale. This fascinating series explores these breakthroughs through three iconic creatures - dogs, birds and dolphins - and discovers how the origins and causes of animals' cognitive abilities lie in their environment. From the dog's ability to know when its owner will return to the cleverest birds in the world and the manipulative power of dolphins, this series reveals the surprising and fascinating ways in which animals understand the world around them.