he Gulf Stream is the world’s most powerful ocean current, and like an underwater freight train, it pushes its way through the Atlantic Ocean at a speed of up to 9km/h. The Gulf Stream can carry between 30 and 150 million cubic metres of water per second, far greater than all the world’s rivers combined, and it terminates off East Greenland, where the warm water is cooled and sinks to the bottom, like a huge submarine waterfall. The colder water subsequently flows south as a new, cool ocean current,
