Introduction

Stephen Dubner: What separates people from non-human animals? Zachary Crockett: Why do we pace when we're stressed or anxious? Angela Duckworth: I recently came across a paper in the journal Frontiers in Psychology, which I was so charmed by that I asked you to read it. And what I really want to know is tell us how it changes your thinking as a psychologist, if at all, about non- human animals.