Golden Yaks Come Back From the Brink Through Cloning

On the Tibetan Plateau, a legend is being rewritten—not with mythological dowries, but with cutting-edge biotechnology.

China has just pulled off something unprecedented: successfully cloning wild yaks, including the rare golden subspecies that numbers fewer than 300 animals in the wild. This isn’t science fiction anymore. In July, researchers from Zhejiang University and the Institute of Plateau Biology of Xizang achieved the first yak cloning in history. Then last month, they cloned ten at once. The offspring weren’t lab creations destined for freezers—they were delivered naturally by wild yak females, which means these cloned animals can actually breed and thrive in their mountain home.

The wild yak (*Bos mutus*) has survived for thousands of years on the highest, coldest reaches of the Qinghai-Tibet Plateau, evolving into the ancestor of domestic yaks and a keystone species of its ecosystem. But humans have been unkind. Hunting, habitat competition, and interbreeding with domestic populations have decimated wild herds. The golden wild yak, a genetically distinct subspecies with a burnished gold coat and superior adaptation to extreme altitude, has fared even worse. That population sits at somewhere between 170 and 300 animals—clinging to existence.

What makes this cloning effort different from past attempts is the foundation. Before the first clone was born, scientists sequenced the genomes of nearly 9,000 wild yaks to create a comprehensive genetic map. They identified the golden yak as an Evolutionarily Significant Unit carrying unique traits tied to hypoxia tolerance, reproductive function, and immune response—literally specialized for life at the edge of the world. Armed with that knowledge, the researchers can now strategically breed diversity back into a population that’s been ravaged by inbreeding.

This is where hope lives. The team plans to establish a new wild herd pulling from the broader wild yak gene pool, then turn their focus to restoring the golden subspecies. It’s a model that works: in 2008, American scientists cloned a black-footed ferret to fight extinction, and that animal’s offspring have since reproduced naturally in captivity. Wild yaks can do the same.

Over 700 local herders and farmers already work to protect these animals in Changtang National Park, keeping domestic herds at bay and patrolling against poaching. But people alone couldn’t stop the decline. Now, biology—the very thing that nearly destroyed this species—might save it. In the highest mountains of China, a golden dowry from legend might finally be restored by science.