If this underwater wall could talk, it might reveal that it once helped Stone Age Europeans hunt reindeer.
Submerged about 20 meters below the surface of the Baltic Sea off the coast of Germany, the wall stretches for almost a kilometer and contains nearly 1,700 stones, making it among the largest human-made megastructures in Northern Europe, scientists report February 12 in the Proceedings of the National Academy of Science.
The team suspects it was used for hunting large prey, similar to ancient hunting traps in the Middle East and North America (SN: 5/17/23). If so, it would be the first known trap of its kind in the southern Baltic region. Â
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