Yellowstone National Park, known for erupting geysers like Old Faithful, is home to one of earth's largest volcanic systems, with the capacity to wreak havoc on an entire continent — and that so ...

The most recent eruption of the Yellowstone caldera occurred approximately 640,000 years ago, while the last lava flow happened around 70,000 years ago.These events, though ancient by human ...

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.

The Yellowstone Volcano Observatory says these explosions “happen almost annually” in Yellowstone Park. The park is even home to the largest-known hydrothermal explosion crater on Earth: Mary Bay.