What Teeth Tell us About Survival on Earth
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.
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