Scientists reveal why the mighty Yellowstone isnt ready to blow

There's not even a hint of a looming eruption at Yellowstone.

But you might wonder why, considering its violent past: Yellowstone has hosted "supereruptions" — the most explosive type of volcanic blast that would be regionally devastating, and blanket a large swathe of the U.S. in ash. These blasts were much larger than any in recorded history. (The last eruption, though not "super," happened some 70,000 years ago and poured lava over the present-day national park.)

New research reveals why the famously steamy park...