The Robot Ships Roaming our Seas

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It sounds like a vision of the future or like something from science fiction, but ships are already sailing the seas with little or no crew on board. They're controlled from land, and this can be done from anywhere in the world. Increasing numbers of companies are starting to embrace this technology, and they say it could revolutionise the shipping industry. For 5 Minutes On, the BBC's science editor, Rebecca Morelle, has been to Norway to explore one of these ships on its maiden voyages. Image credit: BBC/Kevin Church