Beer Bubbles

If you know Ben at all, this question was bound to happen eventually. I figured I would get our first blog week started with an easy one for Ben.

How do bubbles form in beer? 

Beer is made when malted barley is soaked in water and then yeast is added.  The yeast are single celled fungi that eat sugar, piss ethanol (this is the stuff that makes you a better singer), and fart carbon dioxide.  If you seal the container the beer is in, then the carbon dioxide that is released causes the pressure to build up until it starts to dissolve in the beer.  Then when you relive the pressure by opening the bottle or can the carbon dioxide is released and forms tiny bubbles.  However, in most beer the yeast is filtered out before the beer is bottled so they just add carbon dioxide to the beer to the same effect.