Alcoholic drink jugs suggest that intentionally fermented drinks existed at least as early as the Neolithic period (cir. 10,000 BC). Many animals also consume alcohol when given the opportunity and are affected in much the same way as humans, although humans are the only species known to produce alcoholic drinks intentionally. Beer is a beverage fermented from grain mash. It is typically made from barley or a blend of several grains and flavored with hops. Most beer is naturally carbonated as part of the fermentation process. If the fermented mash is distilled, then the drink becomes a spirit. In the Andean region,
Barley The preparatory "kykeon" or mixed drink of the initiates, prepared from barley and herbs, referred in the Homeric hymn to Demeter, whose name some scholars believe meant "Barley-mother". The practice was to dry the barley groats and roast them before preparing the porridge, according to Pliny the Elder's "Natural History" (xviii.72). This produces malt that soon ferments and becomes slightly alcoholic. Pliny also noted barley was a special food of gladiators known as "hordearii", "barley-eaters". However, by Roman times, he added that wheat had replaced barley as a staple. Tibetan barley has been a staple food in Tibetan cuisine since