The Stethoscope and the X-ray: Laurie Taylor explores two medical innovations which have achieved iconic status. Nicole Lobdell, Assistant Professor of English at DePauw University, charts the when, where, and how of our use of X-rays, what meanings we give them and what metaphors we make out of them. Is there a paradox to living in an age where we rely on X-rays to expose hidden threats to our health and security but also fear the way they may expose us? Also, Tom Rice, Associate Professor in Anthropology at the University of Exeter investigates a scientific instrument which has become the symbol of medicine itself. What makes the stethoscope such a familiar yet charismatic object? Producer: Jayne Egerton