THE SERIES OF events that would transform Zhuman Ramazan’s life began 4.6 billion years ago, millions of miles from Earth, when dust, rock, and other celestial debris gathered into an asteroid. In the late neolithic period, sometime around the dawn of writing, the asteroid crashed into Earth’s atmosphere, scattering silvery-black meteorites across the Eurasian continent. Many landed in what is now northwest China’s Xinjiang region, a swath of mountains, deserts, and high-elevation plains about four times the size of California.
In July 1986, Zhuman, a Muslim and ethnic Kazakh herder, was tending his flock on his 100-acre pasture in the region’s far north. Suddenly, a sheep darted away, and Zhuman, then 30, followed it on horseback. Around him, the Chinese county of Altay rose into snow-capped mountains delimiting Kazakhstan to…