Conversation so far:
What is fermentation?
Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes.
How do Louis Pasteur and fermentation go together?
Pasteur motivated to investigate fermentation while working at Lille developed his ideas to establish there is an alcoholic ferment, the yeast of beer, which is found everywhere that sugar is.
Did Louis Pasteur prove his theory?
Pasteur also wrote about alcoholic fermentation. It was published in full form in 1858. Pasteur demonstrated that yeast was responsible for fermentation to produce alcohol from sugar.

Question: Are there any other interesting aspects about this article?
Self-contained rewrite: Are there any other interesting aspects about the Louis Pasteur article besides fermentation and yeast theory?