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 was first discovered in 1928, by Scottish scientist Sir Alexander Fleming. It was a mistake. He left a petri dish with staphylococcus was left open and found with â¦ green - blue mould in it. Alexander Fleming discovered penicillin in 1928 by compete accident. The discovery was made after leaving his desk untidy whilst on holiday.