165 years of washing your hands: Ignaz Semmelweis and the ...
May 14, 2015·Let's call today Throwback Tuesday, and go way, way back to the 1920s. That's when Sir Alexander Fleming stumbled on a mold that stopped bacteria from growing in a petri dish. He called it penicillin. Ever since that huge discovery, people have been looking all over the Earth for more organisms that can fight disease.