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It's another case of a beautiful idea colliding with some ugly facts.

The beautiful idea is the notion that clearing the blocked artery of a stroke patient with a device snaked right up to the blockage would salvage threatened brain cells and prevent a lot of disability.

The leader of a breakaway Amish sect convicted in a series of beard-cutting attacks across Ohio was sentenced to 15 years in prison, today.

Reuters reports:

Yeast can be pretty demanding little buggers, despite being unicellular microscopic organisms. Brewers know they must appease them to get the beer they want.

"It's yeast-strain dependent, it's environment, it's temperature, oxygen levels," says Matt Brophy, brewmaster of Flying Dog Brewery in Frederick, Md. "There's a lot of variables that you need to have a high level of control over."