The Ezra Klein Show

How seashells shaped the world — and predict our future

Vox's Benji Jones talks with author and environmental journalist Cynthia Barnett about seashells and her new book, The Sound of the Sea. They discuss the evolutionary function and human appeal of seashells, the surprising role shells played in ancient trade and commerce, and how climate change threatens the creatures that call them home. Host: Benji Jones…