There are about 500,000 abandoned ... who wander into mines "can drown in flooded shafts, get lost in underground tunnels or perish from poisonous gases present in many old coal mines." ...

But, today, that mining has hollowed out the ground beneath us. Pennsylvania’s inventory of abandoned coal mines is larger than that of any other state in the nation, and the Keystone State has ...

Throughout the fall and winter months, an underground fire sent billowing smoke out of a fissure in the mountainside above Kenilworth, Utah. The fire, burning in a coal seam in the historic Kenilworth ...