The voice carries information about the body often before the mind has caught up. Thea, a voice-led app, listens to the signals and reflects them back. PURIST: The name Thea traces back to an ancient, dramatic origin story. What drew you to it? RACHELLE BARRACK: It comes from Theia, a planet-sized body that is thought to have collided with early Earth around 4.5 billion years ago. The debris from th... [4056 chars]