Zoologist Bill Schutt argues that teeth were pivotal to the success of vertebrate animals, they're power tools for survival. His latest book is "Bite: An Incisive History of Teeth, from Hagfish to Humans." On this podcast extra, Schutt explains why teeth are key to understanding evolution; the controversy over fluoride in water; and why people once thought decay was caused by tooth worms.<br/><br/>Learn more about sponsor message choices: <a href="https://podcastchoices.com/adchoices">podcastchoices.com/adchoices</a><br/><br/><a href="https://www.npr.org/about-npr/179878450/privacy-policy">NPR Privacy Policy</a>

The Healing Power of Music

Go on an adventure into unexpected corners of the health and science world each week with award-winning host Maiken Scott. The Pulse takes you behind the doors of operating rooms, into the lab with some of the world's foremost scientists, and back in time to explore life-changing innovations. The Pulse delivers stories in ways that matter to you, and answers questions you never knew you had.