There's a sleeping fault line that runs along the border between Canada and Alaska. The line has been dormant for millions of years as best scientists can tell. But new research suggests it could be ...

The Pacific is ringed by a vast tectonic boundary that stretches for tens of thousands of kilometers, a shifting seam where plates grind, dive and tear past one another. That planetary-scale fault ...

The San Andreas Fault is the longest and fastest-moving, but over the next decade, Dr. Lucy Jones says it'll probably be one ...