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SANTA ROSA, CA - FEBRUARY 07: Freshly poured glasses of Russian River Brewing Company Pliny the Younger triple IPA beer sit on a counter at Russian River Brewing Company on February 7, 2014 in Santa Rosa, California. Hundreds of people lined up hours before the opening of Russian River Brewing Co. to taste the 10th annual release of the wildly popular Pliny the Younger triple IPA beer that will only be available on tap from February 7th through February 20th. Craft beer aficionados rank Pliny the Younger as one of the top beers in the world. The craft beer sector of the beverage industry has grown from being a niche market into a fast growing 12 billion dollar business, as global breweries continue to purchase smaller regional craft breweries such this week's purchase of New York's Blue Point Brewing by AB Inbev.

If you need to chill a bunch of warm beer for your Fourth of July party, here’s the fastest way to do it.  And you can also turn this into a summer science lesson for your kid if you want. 

The best way to chill a beer super-fast involves salt water  If you’re a “Mythbusters” fan, you might know about this.  They tested it back in 2005.  But “Popular Science” just did a big article about it too.  Here’s why it works . . .

Even without salt, ice water cools down a beer faster than just ice because the water completely surrounds the can.  But SALT water works even better because it freezes at a lower temperature.  Especially if you use a TON of salt.

Normal water freezes at 32 degrees.  But really salty water won’t freeze until it’s about five below zero.  Basically, it’s because the sodium molecules get in there and prevent the water molecules from forming into crystals.

Now, ice actually melts faster in salt water.  But don’t let that fool you.  It’s not because the salt is raising the temperature of the ice.  It’s just converting the ice into salt water that’s still the same temperature.  Right around 32 degrees.

Then if you add even more ice to the mix, the temperature of the water will keep dropping but won’t freeze.  So you can get it down to something like 25 degrees instead of 35.  And that extra ten degrees is huge.

In normal ice water, it takes about 15 minutes to get your beer down to a perfect 38 degrees.  But in really salty ice water, it should only take about five.

(Popular Science)