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.
Originally Englishman Alexander Fleming noticed the activity of penicillin when it had accidentally contaminated a culture he was working on. He made a note of it and did no further work with it. Howard florey an Australian and Ernst Chain got wind of Flemings discovery and went to work to isolate penicillin.