"Run by a fast-growing company called BGI, this facility has become the world's largest centre for the cloning of pigs. The technology involved is not particularly novel – but what is new is the application of mass production. The first shed contains 90 animals in two long rows. They look perfectly normal, as one would expect, but each of them is carrying cloned embryos. Many are clones themselves. This place produces an astonishing 500 cloned pigs a year: China is exploiting science on an industrial scale."