Super Volcano: The Ticking Time Bomb Beneath Yellowstone National Park

Every year, 3 million visitors tour Yellowstone, America's favorite national park. Yet most are unaware they are standing atop one the world's most destructive volcanoes.
It's active and could explode in another colossal eruption!
In field research and interviews, author Greg Breining uncovers the true story of the super volcano underlying Yellowstone National Park. The only volcano in the world fueled by a major hot spot beneath a continental plate, Yellowstone is capable of expelling more than 200 cubic miles of magma in a single blow. Three super eruptions rocked Yellowstone 2.1 million, 1.3 million, and 640,000 years ago, the most recent of which left a 50-mile-wide caldera in the center of the park.
A similar Yellowstone explosion would be devastating. It would rock the earth with the power of thousands of nuclear explosions, cover the western United States in volcanic ash, wipe out much of the world's food supply, and threaten the lives of millions.
What are the chances Yellowstone will reawaken? The park's spectacular geysers, hot springs, and mud pots are all signs that Yellowstone's super volcano has the power to blow again--and Breining makes clear that the answer is not if" it will erupt but when,"