(Please note: This interview originally aired in January of this year.) Our guest on ST is Alexandra Horowitz, author of the bestselling "Inside of a Dog: What Dogs See, Smell, and Know." Horowitz, who teaches psychology, animal behavior, and canine cognition at Barnard College, Columbia University, joins us by phone to talk about her fascinating new volume, which is a collection of essays on how we perceive, discover, and experience the world around us.