Join the University of Beer as we take a look at Sierra Nevada's amazing roster of stouts. We will be looking to the past with their classic American Stout, one of their core lineup that has been brewed consistently since they opened 35 years ago, examining the present with their stellar Narhwal Imperial Stout and its big, bad Bourbon barrel-aged older brother, and gazing towards the future with several dark and roasty rarities, one-offs and firkins from the brewery's R&D department