MIT Technology Review has the story: “In a breakthrough that redefines how life can be created, embryologists working at the University of Cambridge in the UK have grown realistic-looking mouse embryos using only stem cells. No egg. No sperm. Just cells plucked from another embryo.” “The researchers placed the cells carefully in a three-dimensional scaffold and watched, fascinated, as they [the cells] started communicating and lining up into the distinctive bullet shape of a mouse embryo several days old.”….More