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.
The discovery of penicillin, one of the worldâs first antibiotics, marks a true turning point in human history â when doctors finally had a tool that could completely cure their patients of deadly infectious diseases. Many school children can recite the basics. Penicillin was discovered in London in September of 1928. As the story goes, Dr. Alexander Fleming, the bacteriologist on duty at St. Maryâs Hospital, returned from a summer vacation in Scotland to find a messy lab bench and a good deal more.