When liquids such as milk are heated to a temperature slightly below boiling and held there for a set amount of time to eliminate the most harmful bacteria is called
pasteurization. This process was named after Louis Pasteur since he was the first one to recognize it around 1864.
Spontaneous generation is the theory that life can spontaneously form from nonliving material, which Pasteur disapproved. He was part of the
germ theory which states that all contagious diseases are caused by microorganisms. Louis Pasteur was born on 1822 and died on 1895.