Trans-Siberian turns 100: Fascinating facts about the world’s longest railroad

A train moves along the Trans-Siberian Railway through the Taiga district, some 90 km (56 miles) southwest of Russia's Siberian city of Krasnoyarsk. © Ilya Naymushin
The world's longest railway line, the Trans-Siberian, turns 100 in 2016, yet remains one of the busiest lines across the globe. Take a look at the staggering numbers behind the route.