A steam train is a type of locomotive that uses steam power to move. It operates by burning fuel, usually coal or wood, to heat water in a boiler. The resulting steam creates pressure that drives pistons, which turn the wheels of the train. Steam trains were widely used in the 19th and early 20th centuries for transporting goods and passengers. These trains played a crucial role in the development of railways and the expansion of industries. Famous examples include the Locomotion No. 1, the first steam locomotive to run on a public railway, and the Flying Scotsman, known for its speed and elegance.