As Yellowstone’s supervolcano slumbers, another big danger lurks

Yellowstone National Park is known for its bubbling hot springs and steam-spewing geysers. These hydrothermal wonders are powered by a giant cauldron of partially molten rock. It contains enough boiling magma to build several Mount Everests. Yellowstone’s volcano last erupted 70,000 years ago. If it erupted again, it could bury a vast area under lava. … Read more