Fart Smarts: Understanding the gas we pass (ENCORE)

Just in time for fireworks, we're bringing back one of our most-requested episodes. It's a blast from the past encore show. Enjoy! Is farting good for us? Where do farts come from? Why do only some make sounds? And what's up with the smell? We tackle your questions about the gas we all pass - plus the mystery sound (it's not what you thing)!

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