Huge Magma Pocket Lurks Beneath Yellowstone Supervolcano

Supervolcano The supervolcano beneath Yellowstone National Park is more than twice as big as previously thought.

View of the 'Grand Prismatic' hot spring in the Yellowstone National Park, Wyoming.

The 'Grand Prismatic' hot spring in the Yellowstone National Park, home of a massive underground supervolcano.