Yellowstone's Megavolcano is more than twice the beast we feared

Beneath Yellowstone National Park lurks a vast caldera – a high-pressure volcanic cauldron brimming with enough gas and magma to make Mount St. Helens' 1980-eruption look like a middle school science project by comparison. Now, newly reported findings suggest this megavolcanic reservoir is even bigger than previously… » 12/13/13 8:00am 12/13/13 8:00am

Further evidence that the Yellowstone megavolcano could blow without…

Yellowstone National Park sits on top of a giant volcanic caldera, or an earthen cap that covers a huge reservoir of superhot liquid rock and poison gasses. Large parts of the park were formed in previous eruptions, the most recent of which happened about 70,000 years ago. Now, the floor of the caldera is rising, and… » 9/03/12 11:37am 9/03/12 11:37am