This undated photo shows two cloned Shaziling piglets, delivered via surrogate mother, in Xiangtan, Central China's Hunan province. According to the Xiangtan municipal livestock breeding station, the cloned Shaziling piglets, delivered via a surrogate mother on Jan 24 in Xiangtan county, mark a milestone in China's decadelong push to preserve indigenous livestock breeds using biotechnology. To protect the genetic resources …
