Stephanie Kwolek was an American chemist who invented Kevlar, a high-strength synthetic fiber used in bulletproof vests, tires, and other applications. Born in 1923, she earned a degree in chemistry and began working at DuPont, where she made her groundbreaking discovery in 1965. Kwolek's invention has saved countless lives and revolutionized various industries. She received numerous awards for her work and was inducted into the National Inventors Hall of Fame. Kwolek passed away in 2014, leaving behind a lasting legacy of innovation and scientific achievement.