Niu Niu, a cloned, genetically modified cow, and its calf at the experimentation base of Beijing University of Agriculture in Beijing, capital of China, Sept 15, 2015. Niu Niu has given birth to a healthy calf recently, a crucial step toward producing domestic marbled beef. Niu Niu, is one of two clones born in 2012 with a gene inserted to increase the fat level of their muscle. [Photo/Xinhua] |