This week, we’re taking a look at man’s best friend through the lens of current research.  We’ll talk to Brian Hare, director of the Duke Canine Cognition Center and co-founder of Dognition, about his book The Genius of Dogs: How Dogs Are Smarter than You Think. Science writer Virginia Hughes breaks down the genetic history separating dogs from wolves. And author Deborah Blum explains why chocolate is so dangerous for our canine companions.