Scientists reckon they've solved a 180-million-year deep-Earth mystery that could explain why the Appalachian Mountains are still standing. For a long time, it's thought a huge area of hot rock buried ...

What looks like an ordinary mountain road is anything but. Somewhere along that route, without warning, you pass from redwood ...

An area of anomalously hot rocks 200 kilometers (120 miles) beneath the northern Appalachian Mountains could be the product ...

The Appalachian Mountains, with their ancient peaks and timeworn ridges, are a familiar sight in Eastern North America. But ...