A properly poured beer head unlocks deeper aromas and flavor. Here's how to get the beer-to-foam ratio right every time.

The bubble-beer-glass system, like most dynamic systems, ultimately exhausts itself. Left long enough, the foam would vanish, the gas would dissipate and the stout would go still and flat.

When the beer is poured over the top, that trapped air and the curvature of the cavity gives the carbon dioxide a starting point to form bubbles. Those cavities need to be at least 1.4 nanometers ...

Your bubble mileage will vary with the style of beer, type of glass and other factors that can influence the fizz quantity. You could try to count the bubbles yourself, but good luck with that.

The bubble-beer-glass system, like most dynamic systems, ultimately exhausts itself. Left long enough, the foam would vanish, the gas would dissipate and the stout would go still and flat.

When will the bubble burst on Justin Bieber? There are bubbles all over this world and most all of them will burst in time. The most debated one right now is craft beer.

Craft beer sales, routinely up double digits through the first half of the 2010s, have been down 5.3% in 2022 compared with the year prior, according to Chicago-based market research firm IRI.