What science can tell us about our pets – from owning them, to cloning them

Do you ever peer into your pet's face and wonder... what's going on in there? Jay Ingram has been wondering, too. The science writer and broadcaster joins David Common to discuss his new book, The Science of Pets, and delve into what scientific research says about the bond between humans and non-human animals, the ways we try to understand our fellow creatures, and how pets and their ilk have reshaped humanity in ways great and small.