 Modern Marvels: Brewing, a one-hour History Channel documentary, traces the technological evolution of brewing, from the highly sophisticated beer cultures of Sumeria and Egypt, through the centuries of improvements made by medieval monks and witches, to the technological revolution of the 19th Century German-American "beer barons." Milestones range from the 14th Century discovery of lager yeasts, to the recent resurgence of ale in brewpubs around the world. Locations range from Munich s idyllic Augustiner beer garden to St. Louis  gigantic Anheuser-Busch brewery. Along the way, the show stops to celebrate the significant influence beer has wielded throughout history.