Two chimera piglets containing monkey DNA have been born in China. Although both died within a week and appeared to be normal, the baby animals had genetic material from cynomolgus monkeys in their heart, liver, spleen, lung and skin. Scientists said the research, which required more than 4,000 embryos to get the piglets, aims to find ways of growing human organs in animals for transplantation. “This is the first report of full-term monkey-pig chimeras”, Tang Hai at the State Key Laboratory of Stem Cell and Reproductive Biology in Beijing told New Scientist. Five-day old piglet embryos had monkey stem cells...