A mysterious sinkhole in China is spewing fire

A mysterious, fire-spewing sinkhole appeared in northwest China a few weeks ago, and it doesn't appear to be slowing down. The so-called "ring of fire," which lies in a hillside of the Xinjiang Uyghur Autonomous Region, is about 1457 degrees Fahrenheit. In fact, the sinkhole is so hot that geologists haven't been able to figure out how deep it is, because they can't get close enough without getting burned. And while the fire-spewing appears to be a new development, local residents told Chinese m...