Step 1 : Introduction to the question "Which of these scientists discovered penicillin?"
Sir Alexander Fleming was a young bacteriologist when an accidental discovery led to one of the great developments of modern medicine on this day in 1929. Having left a plate of staphylococcus bacteria uncovered, Fleming noticed that a mold that had fallen on the culture had killed many of the bacteria. He identified the mold as penicillium notatum, similar to the kind found on bread. After calling it "mold juice" for several months, he later named the substance penicillin. On February 14, 1929, Fleming introduced his discovery to the world, paving the way for the use of antibiotics in modern healthcare.
