This is the Pioneering Spirit - it's the largest ship in the world. It weighs 1 million tons and likes to pick up entire oil rigs See how they built it on #ImpossibleEngineering at 9p on Science Channel and SCI Go. | Science Channel

When you're building a railroad 16,400 feet above sea level, the most important question is: How do we keep our passengers breathing? Learn more about the construction of the world's tallest railway on tonight's 'Impossible Engineering' at 9pm ET on Science Channel! | Science Channel

Chasm, mountains, earthquakes... These railways will not be stopped. Watch all new episodes of #ImpossibleEngineering Extreme Railroads Wednesdays at 9p ET on Science Channel and on SCIgo. Missed an episode? Catch-up now. --> https://bit.ly/2YI4IVT | Science Channel