Scientists alter DNA to cure blood disorder in embryo

Scientists have coaxed the mutated DNA of human embryos back into healthy code in an experiment which could one day be used to cure a range of inherited diseases. In a world's first, researchers in China proved it was possible to correct a single error in three billion letters of genetic code to remove the disease beta-thalassemia, a blood disorder. British scientists hailed the research as a "highly significant" advance. Darren Griffin, Professor of Genetics at the University of Kent,...