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.
Penicillin has been used throughout history to fight disease, but it was not until 1928 that it was officially discovered.[1] In 1928, Alexander Fleming was conducting a laboratory experiment, and incidentally ran into the fact that the Penicillium fungus had strong antibacterial properties.