<p>➀ In 1938, a Dupont scientist researching refrigerants accidentally discovered a heat-resistant, chemically inert white powder when a gas was stored at dry ice temperatures; </p><p>➁ This material, now known as Teflon, is widely used in kitchens due to its unique properties; </p><p>➂ The story emphasizes the importance of investigating unexpected results, as they can lead to groundbreaking discoveries.</p>