Will genetic engineering change the world?
Normal text size Very large text size When the twin girls were born, one October night in 2018, they carried a secret: a hidden tweak in their DNA even the hospital in China didn’t know about. They were the world’s first genetically engineered humans. The next month, news of their existence broke just as the scientist behind the engineering, Dr He Jiankui, was addressing peers at a global summit. Facing down an uncharacteristically rowdy hall of scientists, he explained: with fertility treatments illegal for prospective parents with HIV in China, he had instead edited the girls as embryos...