Did you know penicillin was discovered from a dirty lab?

In 1928, a scientist left his lab messy and changed medicine forever. His name was Alexander Fleming. He was studying bacteria in London. Before leaving for vacation, he forgot to clean some petri dishes. When he came back, something strange happened. Mold had grown on one of them. Normally, that would mean contamination, experiment ruined. But this was different. Around the mold, the bacteria were gone, destroyed. Fleming noticed it immediately. Something in that mold was killing bacteria. He identified it as penicillium and named the substance penicillin. At first, no one realized how powerful it was. It took years before scientists figured out how to mass produce it. But when they did, everything changed. Before penicillin, simple infections could be deadly. Cuts, scratches, even minor wounds. After penicillin, those same infections became treatable. Millions of lives were saved, especially during World War II. Fleming didn't set out to discover antibiotics. He just paid attention to something most people would throw away. A contaminated dish left behind by accident that became one of the most important discoveries in medical history.