The improbable chain of events that led Alexander Fleming to discover penicillin in 1928 is the stuff of which scientific myths are made. Fleming, a young Scottish research scientist with a profitable side practice treating the syphilis infections of prominent London artists, was pursuing his pet theory–that his own nasal mucus had antibacterial effects–when he left a culture plate smeared with Staphylococcus bacteria on his lab bench while he went on a two-week holiday.
