Virus, used in mice, repurposes adult cells with no risk of cancer
                                
                                
                                    (Newser) -
                                    Scientists have discovered a safer way to turn adult cells into stem cells, the Boston Globe reports. The cells, similar to those harvested from embryos, are called induced pluripotent stem, or iPS, cells; Japanese researchers introduced the method 2 years ago. But the Japanese used retroviruses, which can cause cancer;...