Searching for ancient bears in an Alaskan cave led to an important human discovery

Searching for ancient bears in an Alaskan cave led to an important human discovery
The first people to live in the Americas migrated from Siberia across the Bering Land Bridge more than 20,000 years ago. Some made their way as far south as Tierra del Fuego, at the tip of South America. Others settled in areas much closer to their…

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