Here's a video (with as high quality and focus as I could manage with my inferior technology) of the beer fermenting vessel. You can see that there's a whole bunch of stuff floating around. That stuff swirling about is a bunch of protein, starch, and yeast. The continuous motion is due to convection from low-density alcohol being produced beneath high-density sugar-water (wort) and because of the Carbon Dioxide bubbles that form during fermentation and must rise to the top. More on what's specifically is in the keg later. Sorry there's no audio. I probably should have thrown in the Benny Hill theme or something but I wanted to avoid copyright issues.
Prost!
Not really though. Don't drink that.
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