From the Spring 2018 Penn College Magazine: Nationally recognized brewing expert Tim Yarrington teaches the modern science of an age-old craft in the college’s brewing and fermentation science major. Read "Brewing: Seriously Sciency."From the Spring 2018 Penn College Magazine: Nationally recognized brewing expert Tim Yarrington teaches the modern science of an age-old craft in the college’s brewing and fermentation science major. Read "Brewing: Seriously Sciency."