In Xinjiang Autonomous region of northern China, the cotton fields lay serene under the sun. Acre upon acre of the plants stretched to the horizon, dark green leaves a little dusty from lack of rain. Clouds overhead, however, promised water soon. The white boles had only just begun to open, filling the green fields with lopsided polka dots. A golden eagle coasted on an air current, a darker speck against the gray clouds. To the south lay the ancient Silk Road, and much farther south, the majestic and forbidding peaks of the Kunlun Mountains.
On the roots of the cotton plants, bacteria mutated.