Add Yahoo as a preferred source to see more of our stories on Google. Yellowstone National Park sits atop the world's most famous supervolcano. If it erupted, ash and molten rock would spew across ...

A new study shows a volcanic eruption of Yellowstone may be even less likely than we thought: Scientists have discovered a magma cap that may play a role in relieving volcanic pressure underground.

Geoscientists have discovered a magma cap at Yellowstone National Park that is likely playing a critical role in preventing a massive eruption in one of the largest active volcanic systems in the ...