While working with fermentation, Pasteur’s help was requested when problems arose with fermentation of beer. In his research (Berche 2012) “He observed the presence of small globules in the fermenting juice.” Those globes that Pasteur saw under a microscope turned out to be bacteria. He published his findings in 1857 and for the next several years, he continued his research using different mediums including milk, learning that the cause of food going bad was due to growing micro-organisms. He collected data that supported the hypothesis that there are air born contaminants that infected those mediums that he experimented with. (Berche 2012) “This marked the end of the two-millennium old theory of spontaneous generation.” Not surprisingly,