Louis Pasteur, French chemist and inventor of pasteurisation, 1880.
© Science Museum / Science & Society Picture Library
Louis Pasteur (1822-1895) developed the pasteurisation proces which kills pathogens in milk, wine and foods, and he produced vaccines against anthrax and rabies. In 1884, he was appointed Profesor of Chemistry at the University of Lille where he researched the reasons why some alcohols turn sour. He discovered that bacteria were killed when liquid was heated.