Have you ever wondered about how small germs are? And what are germs anyway? Are you always being told to wash your hands? Do you know why?
The tiny things you know of as germs are known as bacteria by scientists. They are very small and you can’t see them. Many thousands could fit on a pin head. They are alive, in the same way that you are, or a dog is, or a plant is. The study of these and other small living things or organisms is called Microbiology.
