Who discovered penicillin?

Indeed, sir, the discovery of penicillin is credited to Alexander Fleming, a Scottish physician and microbiologist. Fleming made the accidental discovery in 1928 when he noticed that a mould called Penicillium notatum had killed bacteria in a petri dish. Though he recognised its potential, it was later researchers, notably Ernest Boris Chain and Howard Florey, who developed methods to produce and purify penicillin, leading to its widespread use during World War II. The story of penicillin's discovery is one that has inspired generations of scientists, and it remains a cornerstone of modern medicine.