In my first few years of living away from home, I performed a lot of unintentional science experiments in my refrigerator (the variety of colors and textures of mold that can grow on forgotten foods ...

You will need some warm water, a small clean plastic soda bottle, a packet of yeast, 1 tablespoon of sugar, and a small balloon. First, you need to fill the bottle p with bout 1 inch of warm water.

Introduction: Yeasty basics -- Yeast of Eden: drink -- The dough also rises: food -- Frankenyeast: cells -- The little yeast on the prairie: biotechnology -- Yeasts of the wild: yeast diversity -- ...