Beer is fermented (usually) by one of two closely related species of yeast. In this quick bonus episode, we look at what how beer fermentation works, the differences between ale and lager, and how yeast and fermentation impact beer flavor. Enjoy this quick primer on beer fermentation!Follow Bean to Barstool on social media!InstagramFacebookPinterestTikTokSign up for host David Nilsen's newsletter to get regular updates!