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From the History Channel…….. Season 14 Episode 14 Fast-paced, fun and informative, Modern Marvels is The History Channel’s signature series focusing on historical technology. The series has focused (among other things) on wonders of construction (Erie Canal, the Pentagon, the Chesapeake Bay Bridge, the Big Dig), the machinery of war (nuclear submarines, tanks) as well as technology linked to the everyday (power tools, home tech, garbage). A locomotive is a railway vehicle that provides the motive power for a train. The word originates from the Latin loco — “from a place”, ablative of locus, “place” + Medieval Latin motivus, “causing motion”, and is a shortened form of the term locomotive engine,[1] first used in the early 19th century to distinguish between mobile and stationary steam engines. A locomotive has no payload capacity of its own, and its sole purpose is to move the train along the tracks. In contrast, some trains have self-propelled payload-carrying vehicles. These are not normally considered locomotives, and may be referred to as multiple units, motor coaches or railcars. The use of these self-propelled vehicles is increasingly common for passenger trains, but rare for freight (see CargoSprinter). Vehicles which provide motive power to haul an unpowered train, but are not generally considered locomotives because they have payload space or are rarely detached from their trains, are known as power cars. Traditionally, locomotives pull trains from the front …