Yellowstone National Park is home to one of the largest supervolcanoes on Earth, and while its eruptions are rare, the possibility of it blowing is one of the most terrifying natural disaster ...

The Toba supervolcano theory suggests that a huge eruption 70,000 years ago almost led to the extinction of humanity.

Scientists have spied a vast reservoir of hot, partly molten rock beneath the supervolcano at Yellowstone National Park that’s big enough to fill the Grand Canyon 11 times over.