BrainStuff Classics: Why Can It Be Painful To Bite Aluminum Foil?

If you've ever gotten a painful shock from biting down on a piece of aluminum foil, it's becauce dental metal in your mouth formed a type of battery with the foil. Learn how it works in this classic episode of BrainStuff. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com