September 28 - 1928 - Alexander Fleming Discovers Penicillin
Alexander Fleming was a well-known scientific researcher when he discovered penicillin. Yet his discovery of the fungus that would lead to antibiotics was almost accidental. Fleming had left his cultures stacked on a bench when he went on holiday, and he returned to find that one of them had grown mold while he was away because he was not as neat as his colleagues. Fleming also noticed that it had killed the bacteria that it was near. Fleming could never isolate or develop penicillin until he went to chemists at Oxford. By the 1940s, this research allowed Allied troops in World War II to survive various bacterial diseases.