Nova: Inside Animal Minds:

Nova: Inside Animal Minds: "Who's the Smartest?

Sunday, April 27 at 7:00 p.m.

What makes an animal smart?

Many scientists believe the secret lies in our relationships. Throughout the animal kingdom, some of the cleverest creatures—including humans—seem to be those who live in complex social groups, like dolphins, elephants, and apes. Could the skills required to keep track of friend and foe make animals smarter?

Off the coast of Florida, dolphins team up to catch fish by whipping up a wall of muddy water that drives the meal right into their companions’ waiting mouths. It seems that the dolphins are working together to plan their hunt. But are they really?