Michael Rosen returns to explore how metaphors shape our lives with author James Geary. We live, breathe and think in metaphors and communication would be impossible without them. In a far-reaching conversation, Michael and James tease out what they are, why they exist and why we need them in our language. And how it is that the Greek word from which the English word metaphor is derived is still in everyday use in its country of origin. James Geary is the author of I Is an Other: The Secret Life of Metaphor and How It Shapes the Way We See the World. Producer Beth O'Dea