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.
Scottish bacteriologist Alexander Fleming (1881-1955) discovered penicillin by accident in 1928. While conducting research using several petri dishes of bacteria cultures, he accidentally left one of the cultures uncovered for several days. Fleming found the dish contaminated with a mold.