Click above to listen to part 2 of Go With the Flow, featuring Arnaud Chulliat, Geophysicist at the University of Colorado and Institut de physique du globe du Paris, discussing the geology of Earth’s liquid outer core.

Go With the Flow:

Part 1: Mark Miodownik / Liquid Rules

Part 2: Arnaud Chulliat / Liquid Core

Part 3: Philip Matthews / Spittlebug Suds

Part 4: Rose George / Life’s Blood

Podcast also available on PocketCasts, SoundCloud, Spotify, Google Podcasts, Apple Podcasts, and RSS.

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. 

Hosted By

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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