Dolphins are generally considered to be the second smartest animals on earth. They have a robust and multifaceted system of communications just as we do, they raise and teach their young the ways of their world as we do, and like humans, they have brains capable of empathy and altruism.
These are amazing creatures and Diana Reiss has spent 25 years studying them. Her insight into the dolphin mind — why they do what they do and what they are capable of — is fascinating.