At a scientific summit in Hong Kong on Wednesday, the scientist who created the first genetically engineered babies revealed that a second woman is pregnant with a gene-edited embryo. Jiankui He of China’s Southern University of Science and Technology jolted the world this week when the news broke that he had made the first gene-edited people. His ethically dubious experiment produced twin girls, Lulu and Nana, engineered to lack an HIV-susceptibility gene. “There is another one, anoth