The ancestor to modern brewing yeast has been found hiding in Ireland
Found in Patagonia and elsewhere, Saccharomyces eubayanus has now been identified in Europe
![photo of someone pulling a pint of beer](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/12/120622_di_beer-yeast-ancestor_feat.jpg?fit=1030%2C580&ssl=1)
Breweries in Germany shifted from producing ale to producing lager in the 1500s, thanks to the rise of a hybrid yeast called Saccharomyces pastorianus, whose ancestor has now been found in Europe.
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