For over four decades, the 40-story, 26,000-ton Brent Delta oil rig extracted oil and natural gas from 9,000 feet below the surface of the North Sea. Now it's being torn apart, melted down, and sold for recycling. Watch Inside Mighty Machines: Deep Sea Oil Rig, premiering Sunday at 9PM. http://bit.ly/2J2MF9a | Smithsonian Channel

The North Sea has been named one of the most dangerous seas on Earth — and here’s why. Cold, violent storms roll in with little warning, creating towering waves and near-zero visibility. The water temperature is brutally low year-round, meaning survival time after a fall can be measured in minutes. Add powerful currents, dense fog, busy shipping lanes, oil rigs, and some of the world’s roughest weather systems, and you get a sea that has claimed thousands of ships over centuries. #documentary #d