Pensacola was the first European-inhabited settlement in what would later become the United States of America. The first European settlement in the continental United States was Pensacola, which was established on Santa Rosa Island by conquistador Don Tristan tristÃ¡n De luna Y arellano in. 1559
Alexander Fleming discovered penicillin from mold that contaminated a petri dish of Staphylococcus bacteria. Researchers at Oxford University experimented with the new mold that Alexander Fleming had discovered. Penicillin was actually discovered by mistake.
For their work, Florey, Fleming, and Chain shared the 1944 Nobel Prize, but Florey always said, modestly, that a terrible amount of luck had been involved, and insisted that everyone on his team deserved credit. Penicillin was the first naturally occurring antibiotic to be discovered.