Kerosene is a flammable liquid derived from crude oil, commonly used as a fuel for heating and cooking. It is often found in homes and industries, powering devices like kerosene heaters and stoves. Kerosene is also used in aviation as a fuel for jet engines, known as jet fuel. This versatile substance has a long history, dating back to the 19th century when it was first used for lighting lamps. Today, while many alternatives exist, kerosene remains an important energy source in many parts of the world, especially in areas without access to electricity.