Volcanoes inspire awe with spectacular eruptions and incandescent rivers of lava, but often their deadliest hazard is what ...

It creates the Earth's magnetic field and is about 1,400 miles (2,300 kilometers) thick. The next layer is the mantle. Many people think of this as lava, but it's actually rock. The rock is so hot ...

For decades, the prevailing theory behind the mass extinction that ended the reign of the dinosaurs has pointed to a catastrophic asteroid impact near today’s Yucatán Peninsula. The massive crater of ...

Scientists have found previously undocumented ash deposits buried beneath the Lava Creek Tuff in Wyoming — and at least one ...

Earth is divided into four layers: the inner core ... pushed upwards by the force of the plates' movement. Tall, steep volcanoes can also form as a result of the denser rock melting and the ...

In the middle of the Pacific Ocean, thousands of miles from any continent, Easter Island rises out of the sea. Its surface ...

When volcanic eruptions make headlines, the images often depict fiery lava and towering ash clouds. But beneath Antarctica’s ...

Beyond the outer core lies the mantle, a 1,800-mile-thick layer of viscous ... Planet Earth, explained Like Venus and Mars, Earth has mountains, valleys, and volcanoes. But unlike its rocky ...

Because salt has been detected on Mars, it is likely that Martian mudflows are also salty, much like Earth’s mud volcanoes, ...

A giant patch of black, fossilized lava that was spewed across the Sahara desert over millions of years looks like an eerie, ...