Embryos implanted in pigs were part human and part pig
                                
                                
                                    (Newser) -
                                    Researchers have created part-human-part-pig embryos in what other scientists are calling an "exciting" step toward proving the viability of human-animal chimeras, the  BBC  reports. The researchers injected human stem cells into pig embryos, then implanted those embryos into adult pigs. After a month or so, the developing pig was...