We all have a vocal tract, but how many of us know exactly how it works? How do singers manipulate the shape of their vocal tract to create beautiful tones? Dr Chris Carignan talks to us about how amazing the vocal tract is, and why we need a better understanding of it. The video version of this episode is available on our YouTube channel. Check it out because Chris attached an ultrasound and did the whole interview with it on, so you can actually see his vocal tract change in real time while he's talking.