<p>Dogs are, above all, creatures of the nose. What can they sniff out, and what can we learn about smelling by following them? Alexandra Horowitz talks to a detection-dog handler and a food critic about olfaction, then puts some Freakonomics hosts' noses to the test.</p>

Dogs are, above all, creatures of the nose. What can they sniff out, and what can we learn about smelling by following them? Alexandra Horowitz talks to a detection-dog handler and a food critic about olfaction, then puts some Freakonomics hosts' noses to the test.

1. Smell

Dog-cognition expert and bestselling author Alexandra Horowitz (Inside of a Dog) takes us on a walk into the scruffy, curious, joyful world of dogs. What does it mean to "own" a dog? Can dogs demonstrate genuine heroism? And what is it like to experience reality primarily through smell? Off Leash is a delightful and surprising look at the deeply familiar, profoundly mysterious animals who walk alongside us.

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