Ancient Tibetans crossbreed yak, cattle 2,500 years ago: study

This cellphone photo taken on April 10, 2022 shows yaks in Ngari Prefecture, southwest China's Xizang Autonomous Region. A new archaeological study has shown that inhabitants of the southern Qinghai-Tibet Plateau engaged in crossbreeding of yak and cattle in the high-altitude region at least 2,500 years ago. (Xinhua/Shen Hongbing)