On this day, September 28th, in 1928, Scottish bacteriologist Alexander Fleming discovered penicillin by accident when he noticed that mold had contaminated one of his petri dishes and was killing nearby bacteria. This groundbreaking moment laid the foundation for modern antibiotics, revolutionizing medicine and saving countless lives! Who knew a little mold could change the world? 🌍💉✨ #HistoryMakers #MedicalRevolution #FlemingDiscovery