Who knew? I sure didn't. Fascinating.

This is kinda interesting and cool to learn about, but scary at the very same time. Another issue we need to concentrate on getting under control for global health to the extent we can. Get some knowledge..
Deep Underground, Miles of Hidden Wildfires Rage - TIME http://www.time.com/time/health/article/0,8599,2006195,00.html?artId=2006195?contType=article?chn=sciHealth