Have you ever poured a beer or been drinking from a bottle and noticed a cloudy layer of white stuff in the bottom of the bottle? There are some odd theories floating around about that stuff, and most of them aren't true. Here's the real story.

Bottled beer has been around for a long time. Some brewers fill bottles with still beer and a bit of sugar, like casks. The secondary fermentation in the bottle produces carbonation and a thin layer of yeast sediment in the bottom. Other brewers carbonate their beer at the brewery then fill the bott