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A Chinese researcher says he's helped make the world’s first genetically edited babies, polarising opinion within the scientific community. Joyce Harper from University College London told the Â鶹Éç that the research is premature, and that we're "sprinting before we can walk" in the field. The scientists behind the claim their work has resulted in the birth of twin girls, who were born a few days ago. (Photo: DNA research, credit: CONEYL JAY / SCIENCE PHOTO LIBRARY)