You just knew a Cheesehead would be in the thick of things when it came to lager yeast research.
How did lager beer come to be? After pondering the question for decades, scientists have found that an elusive species of yeast isolated in the forests of Argentina was key to the invention of the crisp-tasting German beer 600 years ago.
It took a five-year search around the world before a scientific team discovered, identified and named the organism, a species of wild yeast called Saccharomyces eubayanus that lives on beech trees.
"We knew it had to be out there somewhere," said Chris Todd Hittinger, an evolutionary geneticist at the University of Wisconsin-Madison and a coauthor of the report published Monday in the Proceedings of the National Academies of Sciences.
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