International Beer Day: Why beer foam is actually important to the drink

Long days: We've all had 'em. Some of us might be having one at this very moment.

Now imagine this: You go to your local watering hole to relax, but your bartender is also having a trying day, and tragically pours your lager, stout, Guinness or pale ale a bit too quickly.

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Bubbles — all the bubbles — inexorably overtake the rim of the glass and spill all over the bar. And you think to yourself, "What are the point of all those bubbles?!?"

Luckily, Kyle Wilson, the head of brewing at Brooklyn Brewery, has an answers that should somewhat calm your frustrations. In a segment for Fox News' "Origins" series, he explains the science of the foam, how it impacts flavor, and how much foam is really appropriate for the top of your beer.

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Watch the “Origins” segment above to find out, and try not to blow up on your bartender.