“What happened this time was an ethics disaster for the world,” according to Wang Yuedan, a professor of immunology at Peking University, as quoted in The New York Times. He was talking about the recent claim by U.S.-trained Chinese scientist He Jiankui that he’d successfully altered the DNA in vitro of human embryos that were later born as twin girls in China. If true as claimed, the edits he made would be inherited by any of their future offspring.