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Archaeologists typically study human history and prehistory through the excavation of artifacts buried underground. Sometimes, how, they disc artifacts subm underwater. A stone wall w found ben the Baltic Sea i 2012 th dates t over 10,000 ye ago. Resea believe it was used by hunter-gatherer societies to guide and trap reindeer. The wall consists of approximately 1,670 stones and is considered one of the oldest documented hunting structures made by humans.
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参考答案：ever over erged as eath n at o ars rchers