Cheers! Video Reveals Bubbly Science Behind Brewing Beer

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A batch of Sierra Nevada Bigfoot Barleywine bubbles and froths in this time-lapse video produced by Sierra Nevada Brewing Company.

Very simply, beer is made by extracting sugar from grains and fermenting these sugars with yeast to turn them into alcohol. Wort is the sticky, sweet liquid extracted from mashing grains like barley or wheat. Hops are small, green conelike fruits from a vine plant that provide flavor. When yeast is added to the mix, it eats up all the sugar in the wort and spits out carbon dioxide and alcohol as waste products.

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Nina Sen is a frequent contributor to Live Science’s Life’s Little Mysteries series: an exploration and explanation of our world’s phenomena, both natural and man-made. She also writes astronomy photo stories for Live Science's sister site Space.com.