Thirteen years ago, a group of Chinese researchers located and explored an ancient structure so unusual that an extraterrestrial hypothesis was promptly taken into consideration.
The fascinating ruins were discovered in the remote wilderness that makes up most of the intersection between China’s Qinghai province and the Tibetan Autonomous Prefecture. Throughout history, humans have seldom settled in this harsh and inhospitable area. Only occasionally, migrant herdsmen pass through the mountainous regions to the north.
No industrial facilities can be found in the zone, much less the remnants of civilizations with advanced metalworking capabilities…