Back in 1928, while bacteriologist Alexander Fleming was away on vacation, he left a petri dish in his lab 🍽️. When he returned, he discovered that a liquid around the mold had killed the bacteria in the dish! 🦠💥 This led to the creation of the world’s first antibiotic, but before it was known as penicillin, it was humorously called "mold juice"! 🧫💧 Talk about a surprising discovery! facts fun fact science history