"The stowaway, yeast that may have been transported from a distant shore on a piece of wood or in the stomach of a fruit fly, was destined for great things. The newfound yeast fused with a distant relative, Saccharomyces cerevisiae, which was used for millennia to make leavened bread and fermented wine and ale. The resulting hybrid, representing a marriage of species as evolutionarily separated as humans and chickens, would give us lager, the clear, cold-fermented beer first brewed by 16th century Bavarians."
Scientists have finally identified the wild yeast, Saccharomyces eubayanus, and solved the age-old mystery of lager beer.
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