Mount Rainier monitored closely as scientists keep watch for signs of volcanic activity
Experts believe a Mount Rainier eruption would post a grave threat to millions who live in the southern and eastern sections ...
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Yellowstone vs. Mt. St. Helens: America’s Giant Volcanoes Compared
Mt. St. Helens and Yellowstone are two of the largest and most famous volcanoes in the United States. Learn how they compare in this fascinating video!