The world’s oceans are hiding a treasure so vast it almost sounds unreal. Scientists say there could be around 20 million tonnes of gold dissolved in seawater, a stash that, on paper, could be worth more than $2 quadrillion. But there’s a catch. The gold isn’t sitting in chunks or nuggets. It’s scattered in microscopic traces, so diluted that it may never be within our reach. And yet, the question refuses to go away. With so much gold beneath the waves, could future technology ever make it possible to extract it? Or will it remain a glittering dream locked away by nature? (full story)