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.
Its antibiotic qualiti â¦ es were discovered in 1928 by Alexander Fleming. Penicillin was commonly prescribed to take care of bacterial infections in humans and animals. Since bacterial strains mutate, it's not quite as effective as it was when it first came on the market in the 1930s.