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Scientists have found a giant wall underneath the Baltic Sea — and they're pretty sure humans made it., the German research team who discovered the megastructure, which they've called the Blinkerwall, say they believe it was constructed for hunting on land.
With sediment dating estimates putting the Blinkerwall's age at between 10,000 and 11,000 years ago during the Stone Age, scientists say the uniformity of this lengthy structure — which runs for 971 feet, or roughly 60 percent of a mile — makes it seem more likely to have been made by humans than by the movements of glaciers or tsunamis. If they're right, it could be the "oldest man-made megastructure in Europe," the paper declares.
"When you chase the animals, they follow these structures, they don’t attempt to jump over them," first paper author Jacob Geersen explained in anIndeed, the geoscientists say in their paper that they found evidence of a second wall parallel to the larger Blinkerwall, but it's likely buried in sediments., it wasn't until 2021 that the Kiel team detected what they now call the Blinkerwall when out on a research expedition.
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