Scientists explain why Guinness defies the laws of physics - and why you’ve been pouring it wrong

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When it comes to pouring the perfect pint of plain, it looks like we have all been doing it wrong. Most beers are carbonated using carbon dioxide, but Guinness bubbles are filled with nitrogen. This is what gives the stout that iconic silky texture in your mouth and distinctive creamy head resting above the dark beer. When you look closely at a Guinness while it's settling, the bubbles are actually falling instead of rising

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