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.
During World War I he began experimenting with antibacterial substances and in 1921 discovered lysozyme, an antibiotic enzyme that attacks many types of bacteria. .In 1928, Fleming discovered the germ-killing properties of the mold juice secreted by penicillium, he knew that it could have profound medical value.