This is part 3 of our three-part series about elements. And today is a biggie: carbon. When we hear about carbon, it's usually about its role in heating up the planet. And while that's an absolutely critical part of the story, the story of this most miraculous of substances is so much larger.

We talk to Peter Brannen, author of The Story of CO2 is the Story of Everything, about how carbon has always been central to just about every major turning point in the history of life on Earth...including why life is here in the first place.

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This episode is hosted by Executive Producer Carlyle Calhoun. Editing help from Eva Tesfaye and Jack Rodolico. Our theme music is by Jon Batiste, and our sound design by Dennis Funk.

Sea Change is a WWNO and WRKF production. We are part of the NPR Podcast Network and distributed by PRX. Sea Change is made possible with major support from the Gulf Research Program of the National Academy of Sciences, Engineering, and Medicine. WWNO’s Coastal Desk is supported by the Walton Family Foundation, the Meraux Foundation, and the Greater New Orleans Foundation.