Needless to say discoveries and researches regarding Mocrobes could be possible only after the inventionof the microscope as they could not be seen with the naked eye. Development of electronic microscope has helped further the scope of study regarding Mocrobes. These scientific inventions have belief the belief that all microbes are harmful. It has become clear that only certain microbes are harmful while most of them are used ful. This table gives the history of microbiology.

    Habitats of Microbes 

Microbes can exist in all types of habitats. They are generally single celled but sometimes they occur in chain of cells they can be easily collected from air and water especially .