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