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.
Sir Andrew Fleming discovered penicillin in 1928 while doing experiments in St Mary's Hospital in London. the Australian Howard Florey lead a team of scientists who discovere â¦ d a way of mass producing penicillin which helped turn it into a viable treatment.