A group of Chinese researchers identified and explored an ancient cave so unusual that an extraterrestrial hypothesis was quickly taken into consideration.<br /><br />The fascinating ruins were discovered in the remote wilderness area that makes up most of the intersection between China’s Qinghai Province and the Tibetan Autonomous Prefecture.<br /><br />Throughout history, humans have rarely settled in this hostile and inhospitable region.<br />Sometimes herds of migrants cross the mountainous regions to the north.<br /><br />In the region there are no industrial factories, nor the remains of civilizations with advanced metal processing capabilities.<br /><br />Want to find out more? Then check out our website: Area51Aliens.org
