The caldera is the enormous volcanic crater left from the last time Yellowstone experienced a giant eruption, 640,000 years ago. It covers an area about 30 by 45 miles .

In geology, even small layers can tell big stories. But figuring out the origins of such small layers can be a challenge, ...

A hydrothermal explosion at Biscuit Basin led some to believe a massive volcano beneath Yellowstone National Park is set to erupt. Here’s why that’s false.

A hydrothermal explosion at Biscuit Basin led some to believe a massive volcano beneath Yellowstone National Park is set to erupt. Here’s why that’s false.

A hydrothermal explosion at Biscuit Basin led some to believe a massive volcano beneath Yellowstone National Park is set to erupt. Here’s why that’s false.

A hydrothermal explosion at Biscuit Basin led some to believe a massive volcano beneath Yellowstone National Park is set to erupt. Here’s why that’s false.

A hydrothermal explosion at Biscuit Basin led some to believe a massive volcano beneath Yellowstone National Park is set to erupt. Here’s why that’s false.

A hydrothermal explosion at Biscuit Basin led some to believe a massive volcano beneath Yellowstone National Park is set to erupt. Here’s why that’s false.

A hydrothermal explosion at Biscuit Basin led some to believe a massive volcano beneath Yellowstone National Park is set to erupt. Here’s why that’s false.