This article is about yeast. This is a very interesting article because it talks about how Fleischmann's yeast is made, the history of yeast, and what yeast is. Well yeast is used for bread rising. It is also used in the brewing process for beers, wines, and alcoholic beverages. Well it is a fungus.
Yeast are microscopic, one celled organisms.
These wonderful organisms range in size from 1-30 microns in diameter. Many different kinds of yeast have been identified. Wild yeast is everywhere. This may cause a real problem for brewers, the article says. Wild yeast cells are carried from place to place by air and dust.