Before antibiotics, even a small cut could steal a life. Families lived in fear of infections they could not see and could not stop. But everything changed when a single contaminated Petri dish caught the eye of Alexander Fleming, and a generation of determined scientists refused to let the discovery fade.This book tells the dramatic true story of how penicillin rose from accident to breakthrough through courage, teamwork, and relentless curiosity. Teens will find inspiration in the obstacles overcome; parents will appreciate the real history behind a medicine that reshaped modern life.A powerful, motivating journey into science, perseverance, and the extraordinary impact of one observation made at the right moment.