Scientists in Britain just got approval to conduct research that involves editing the genetic material of healthy human embryos. This is a big deal: The UK's Human Fertilisation and Embryology Authority is the first government agency in the world to endorse research that involves altering the human genome for research -- a move that could signal broader acceptance for a promising (but controversial) new area of science. The research team, led by Dr. Kathy Niakan at the UK's Francis Crick Institute, is trying to better understand which genes allow a healthy human embryo to develop. Niakan's team will use a...