Microbes are organisms that must be magnified hundreds or thousands of times to be seen. They have fascinated people since late 1600s. The study of microbes, or microorganisms, is called microbiology, which is a very popular and interesting field of science.
Every microorganism has a very short life.
A generation of microbes last less than 30 minutes. At the end of their generation, a microbe splits into two microbes. So they double in quantity very quickly. Microorganisms are very very small. They can only be seen under microscopes.