Click above to listen to part 2 of Shell on Earth, featuring Al Tanner, Ph.D. student in paleobiology at the University of Bristol, U.K., explaining why cephalopods, unlike their other mollusk relatives, evolved to be shell-less.
 

Shell on Earth:
Part 1: Rowan Lockwood / Oyster Paleobiology

Part 2: Al Tanner / Naked Cephalopods

Part 3: Mike Brown / Earth’s Shell

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2026 Webby Award Nominee
for our three part series on the 20th anniversary of Hurricane Katrina

Big Picture Science is an immersive radio show and podcast that reveals the unexpected connections in science.

Our Skeptic Check episodes take a critical look at extraordinary science claims and pseudoscience.

Don’t settle for a science snapshot. Get the big picture. 

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Molly Bentley Executive Producer and Co-Host, Big Picture Science  

Seth Shostak Producer and Co-Host, Big Picture Science
Senior Astronomer, SETI Institute

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