If you've sipped a cold one and wondered where all that flavor comes from, it's the yeast. This one ingredient sets ales and lager apart with a difference you can taste. Top fermenting ale yeast ...

For centuries, lager beer has been made from the same core ingredients: malt, hops and yeast. Curious scientists wondered if they could tweak one of these components and unlock original beer flavors.

Humans have taken advantage of the metabolism in a tiny fungus called yeast to create beer and wine from grains and fruits. What are the biological mechanisms behind this alcohol production?