In Yellowstone National Park, a bulge the size of 279 football fields has risen by an inch since last July. With no signs of slowing down, the bump that’s roughly 19 miles across may cause some worry ...

A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park.

Learn more about the past eruptions at Yellowstone National Park and how each new eruption displaced evidence of the past.

U.S. Discovery Reveals $1.5 Trillion of ‘Volcanic White Gold’ ...

But as a reader of Yellowstone Caldera Chronicles, you probably guessed that things are slightly more complex. Almost nothing at Yellowstone, or any other volcano, is simple. Volcanoes are complicated ...

This stunning astronaut photo shows the natural beauty of Japan's Aso Caldera — a giant crater-like bowl containing 17 different volcanoes, leftover from major eruptions spanning over 200,000 years.

Volcanic soil is toxic in just about every way. But these worms have remarkably homogenous DNA.