In September 1928, Alexander Fleming returned from vacation to find a contaminated culture plate — a mold had grown on it, and in a ring around the mold, all the bacteria were dead. Most scientists would have thrown it away. Fleming looked more closely, recognized what he was seeing, and named the substance penicillin. This episode of Sidequests covers the discovery, the decade-long stall before anyone could make it work, how World War II created the urgency that finally drove Florey and Chain to solve the stability problem, and why the story of the first antibiotic is really a story about accident, observation, and the gap between scientific discovery and practical medicine.
","author_name":"Keith Conrad"}