What we know — and don’t — about claim of the first gene-edited babies

What we know — and don’t — about claim of the first gene-edited babies

What we know — and what we don’t — about the claim of world’s first gene-edited babies

By ELIZABETH COONEY

MARK SCHIEFELBEIN/AP

A Chinese scientist has shocked the world with claims he used the genome editing technology CRISPR-Cas9 to manipulate the genes of two human embryos.

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