In 1928, Scottish bacteriologist Alexander Fleming returned from holiday to a stack of staphylococcus plates, noticed a blue-green mould had cleared a halo through the bacteria, and gave the leaking compound a name that would change medicine: penicillin
When Alexander Fleming returned to his St. Mary's Hospital lab in September 1928, a contaminated petri dish would change medicine forever. The story of how a blue-green mould, a rotting Peoria cantaloupe and an artist's eye for the odd produced the drug that has saved half a billion lives.