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.
Bacteria usually contaminated the tissue, but Enders' team was now able to get penicillin -- discovered 20 years earlier by Alexander Fleming and developed in the 1940s by Ernst Chain and Howard Florey -- and prevent the bacterial growth. Now viruses like mumps or polio could be created in large quantities for study.