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NOVA
How—and why—DNA Testing Uses Biased Reference Databases
Because of the Eurocentric bias of genetic reference databases, DNA ancestry test results for individuals of African and Asian descent are often less detailed than results for individuals of European descent.
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Follow engineers and woodworkers as they rebuild an iconic American covered bridge.
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Follow the harrowing operation to rescue 12 boys stranded in a flooded cave in Thailand.
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How courage and ingenuity saved Allied troops during the epic Dunkirk operation in 1940.
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