FAN FAVE: Why do farts come out of your bum?

We've been spring cleaning the Imaginarium and have come across some old favourites! This golden oldie's a gas... literally!

Today we're talking about something that all of us do. They can be loud or soft, sometimes smelly and almost always funny. We're talking about fluffs, toots, air biscuits - yes, farts! - and why they come out of our bums. Join Professor Kourosh Kalantar-Zadeh as we shrink to fit inside his gas-smelling capsule to follow the journey of gas in our bodies.

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