Basic beer brewing is a simple enough process that long-extinct civilizations in Egypt and ancient Sumeria were able to do it. A source of starch -- beer makers use anything from malted barley to rice husks -- is steeped in hot water to extract the sugars. The liquid is strained and poured over yeast, which eat the sugar and produce alcohol as waste. That's what gets you drunk -- microscopic yeast poop.
CandaceWest.com Beer brewing student Arthur Best listening in class; Micro brews for sale at BX Beer Depot.