The first root beer was carbonated by fermentation using yeast, which resulted in a foam head similar to what you’d get when ...

Because humans discovered fermentation so long ago, it's difficult to find evidence of exactly where beer-making began ... period (10,000 to 4,000 years ago), when agriculture took root, in sites all ...

Selecting Yeast in Beer Brewing and Wine Making Humankind has benefited from fermentation products, but from the yeast's point of view, alcohol and carbon dioxide are just waste products.