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Mother of all lager beers from the Andes.

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Scientists find original 'lager' yeast in Argentina.

There are two types of yeast used in brewing beer:

1) Saccharomyces cerevisiae - Ales; top fermenting, prefers 65-70 F
2) Saccharomyces pastorianus - Lagers; bottom fermenting, prefers 40-45 F

Lagers were invented much later, probably in the 1400s, and it is thought that Saccharomyces pastorianus is a hybrid between Saccharomyces cerevisiae and another yeast. Scientists have recently found yeast in Argentina that could be the mother of all lager yeast.

http://www.bbc.co.uk/news/science-environment-14592877
 
Ehh, I could do without pastorianus ....
But ... I loves me some Brettanomyces!

oh hell yah with that. half the Boulevard Imperial Stout this year got infected with Brett, and it adds a nice sour note. Like nothing I've tasted. I quite enjoy it. Also they make a saison brett which is delicious.
 
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