: The massive volcano system beneath Yellowstone National Park .
: An eruption could be large enough to plunge the entire planet into a "volcanic winter". X-Ray Earth
: 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 : The massive volcano system beneath Yellowstone National
X-Ray Earth - National Geographic for everyone in everywhere X-Ray Earth
: Pressure has been building for over 300 years. A slip could trigger a mega-earthquake and a devastating tsunami. Episode 2: Atlantic Coast Killer Focus : The Atlantic island of La Palma.