Dolphins, chimpanzees and other mammals are among the smartest creatures on Earth. Deep in the ocean, though, lives another class of highly intelligent animals – cephalopods. This hour, we’ll talk about how the octopus and its close relatives were likely the first to develop a complex nervous system – and about how that evolution took place independent of land animals – with City University of New York professor Peter Godfrey-Smith. He’s the author of “Other Minds: The Octopus, the Sea, and the Deep Origins of Consciousness” (Farrar Straus and Giroux).