How Animals Think

As biologists gain a better understanding of how animals think, one thing has become evident: humans have underestimated the intelligence of other creatures for far too long. This hour, we’ll talk about current research into animal intelligence with Frans de Waal, director of the Living Links Center at the Yerkes National Primate Research Center. His new book is “Are We Smart Enough to Know How Smart Animals Are?” (W.W. Norton and Co.).