Beer Yeast Separates The Ales From The Lagers

Yeah -- I know -- this is supposed to be a blog about access technology and web accessibility and all that rot a tot. But it is never too early to gear up for the Accessing Higher Ground conference where we socialize outside the meeting hall as much as in the sessions. In preparation for that socializing - NPR's Science Friday presents:
Beer Yeast Separates The Ales From The Lagers
Different types of beers — ales, stouts, etc — are distinguished primarily by their yeast, but now these groupings might get even more complicated. Scientists have examined the genetic sequences of 17 unique lager yeast strains tracing variations in their genetic code back through time.