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A team of scientists exploring an underwater region of southern Southeast Alaska has discovered what might be the oldest stone fish weir ever found in the world. The existence of the fish trap, which is thought to date to at least 11,100 years ago, was confirmed earlier this year by a group of university academics and Sunfish Inc., a robotics company specializing in undersea exploration and inspection. The scientists, in partnership with Sealaska Heritage Institute, are using artificial intelligence to explore ancient, submerged caves in the...