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As scientists apply our new understanding of the human genome to genetics, we\\u2019re getting answers to big-picture questions about our species. What is race? How did humanity spread around the globe? How should we pick a mate (genetically speaking)? We talk with Adam Rutherford, geneticist and author of A Brief History of Everyone Who Ever Lived:The Human Story Retold Through Our Genes. about the history of our genes, and what they reveal about our species.
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