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Underwater Drone Images Reveal Oldest Human-Made Structure In The Baltic Sea - Ancient Pages
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While conducting a mineral survey on the Baltic Sea floor, scientists stumbled upon an unanticipated discovery. Their acoustic imaging technology unveiled a submerged stone wall that extended nearly a kilometer in length. Further exploration using underwater drones revealed that this wall was composed of over 1,500 stones, primarily granite pieces roughly the size of tennis or soccer balls.
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