: Scientists explore the potential for a massive landslide that could send a killer tsunami across the ocean toward the U.S. East Coast. Episode 3: Volcano Apocalypse
: An eruption could be large enough to plunge the entire planet into a "volcanic winter". X-Ray Earth
X-Ray Earth - National Geographic for everyone in everywhere : Scientists explore the potential for a massive
: The massive volcano system beneath Yellowstone National Park . X-Ray Earth