Bacteria are single-celled, or simple, organisms that are invisible to the naked eye. Many bacteria are found both inside and outside of organisms, including humans. They usually dwell in places where nutrients can be found, like inside animals and plants, or on the surface of substances like soil, water, and food. Factors such as age, diet, and location can affect which types … [Read more...] about Good vs Bad Bacteria: Types, Benefits and Side Effects