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A man can see stars in far places.But he can't see the micro organisms which is near to him. What is the reason?
Microbes/Micro organisms are extremely small, and can only be seen with a microscope. They are smaller than a human red blood cell. Millions of microbes can fit inside the eye of a needle. They are also very old. In fact, they are the oldest form of life on Earth. They roamed the Earth  in their own microscopic way hundreds of millions of years before the dinosaurs. They live everywhere. Dig up the soil, and you will find countless microbes living there. Take a sample of air, and they are there as well. They even live inside our digestive systems.


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