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4 films
The Flying Scotsman and other historic locomotives showcase their revival on preserved railways across Britain, highlighting the legacy of the 'Big Four' railway companies.
One French scientist, Sadi Carnot, discovered the laws of thermodynamics in the 19th century, which explain how heat engines operate efficiently.
Cumbres & Toltec Scenic Railroad, established in 1880, spans 64 miles between Chama, New Mexico, and Antonito, Colorado, crossing the 10,015-foot-high Cumbres Pass.
169,000 steel sleepers are excavated and restored by veteran workers in Eritrea as part of a project to revive the country's long-abandoned railway system.
