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

The most volcanic world in our solar system has sprouted a new volcano. And its lava flows are enormous. Jupiter's molten moon Io has been surveyed by a number of passing spacecraft, allowing ...

In the shadow of Italy’s Vesuvius, a lesser-known volcano rumbles: Campi Flegrei. An eruption could endanger the millions of residents of the city of Naples. NOVA is available to stream on pbs.org and ...

The Earth's mantle might not always move along in lockstep with the overlying tectonic crust—as set out in science textbooks for decades—but may instead behave differently. This is the conclusion of ...

For decades, scientists believed that magma chambers beneath volcanoes were transient, forming before an eruption and then ...

A long quiet volcano in Ethiopia has roared back to life, blasting ash roughly 9 miles into the sky and catching both nearby communities and scientists off guard. After an estimated 12,000 years ...

Jupiter's moon Io, a world teeming with volcanoes. The most volcanic world in our solar system has sprouted a new volcano. And its lava flows are enormous. Jupiter's molten moon Io has been surveyed ...