Shenzhen, China

Gene editor vanishes: The Chinese scientist who claimed to have successfully created the world’s first genetically engineered babies has gone missing. He Jiankui gave a presentation in Hong Kong last week on his controversial experiment but hasn’t been seen or heard from since. Chinese media reported that He had been brought back to his hometown of Shenzhen and was under house arrest. His former college, the Shenzhen-based Southern University of Science and Technology, which knew nothing of his controversial work, said it could not comment on his possible detention. He claims to have altered the embryonic genes of twin girls to make them resistant to HIV. Other scientists say that based on the slides shown at He’s Hong Kong press conference, he likely has not protected the girls from future HIV infection and may have left them with debilitating gene mutations.