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AI and human extinction

BBC Inside Science

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The Power of Genetics in Sled Dogs

In 1925, sled dogs carried life-saving serum across 674 miles of Alaska wilderness. The final leg was led by a dog named Bolto who died 90 years ago. Now he's assisting researchers in demonstrating the power of a new genetic tool. But first we find out exactly what makes modern sled dogs so well-suited to jobs.

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