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Scientists Attempt Controversial Experiment To Edit DNA In Human Sperm Using CRISPR

06:10
June Wang, a Weill Cornell Medicine lab technician, views a sample of human sperm. She's preparing to try to edit the DNA in the sample with a gene-editing technique called CRISPR. (Elias Williams for NPR)
June Wang, a Weill Cornell Medicine lab technician, views a sample of human sperm. She's preparing to try to edit the DNA in the sample with a gene-editing technique called CRISPR. (Elias Williams for NPR)

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