Our stomachs are full of a powerful acid, one that can burn your skin and even melt metal. So why doesn’t this stuff burn a hole through our bellies? We’ll find out how our stomachs protect the rest of us from this acid. Plus, we’ll learn about some of the wildest ways animals digest food and learn about how a serious accident helped us. Don't forget to listen to the Mystery Sound and the latest suggestions for new rooms in our headquarters.

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Want to see Brains On live?!? We are probably coming to a city near you. For a complete list of shows and links to tickets head to our events page. More shows announced soon!

Feb 21 - Just for Laughs Festival, Vancouver, BC

Feb 22 - The Neptune, Seattle, WA

March 7 - Turner Hall Ballroom, Milwaukee, WI

March 8 - Fitzgerald Theater, St. Paul, MN

March 28 - Center Stage, Atlanta, GA

March 29 - Amaturo Theater, Fort Lauderdale, FL

Click here for a transcript of this episode