An international team of scientists announced Thursday that the majority of people in Central and South America can be linked to a single ancestral lineage of humans who journeyed across the Bering Strait at least 15,000 years ago.

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An international team of scientists announced Thursday that the majority of people in Central and South America can be linked to a single ancestral lineage of humans who journeyed across the Bering Strait at least 15,000 years ago.