Penicillin is a group of antibiotics that are used to treat bacterial infections. It was discovered by Scottish scientist Alexander Fleming in 1928. The discovery of penicillin is considered a major milestone in the history of medicine, as it revolutionized the treatment of bacterial infections and saved countless lives. Fleming was a professor of bacteriology at St. Mary's Hospital in London. In 1928, he was conducting research on the influenza virus when he noticed that a culture of St...