A volcano that has been active in recent years erupted again on Hawaii’s Big Island on Friday, according to the U.S. Geological Survey.

Olympus Mons, a shield volcano on Mars, is the largest volcano in the solar system, measuring approximately 370 miles in diameter and 26 kilometers in height. The formation of Olympus Mons and three ...

In Italy, a super volcano outside of Naples is stirring in a way it hasn't for centuries. And hundreds of thousands of people live right by it.

Imagine a volcanic eruption so large it spewed 24 cubic miles of ash, rock, and gases into the air, produced smoke that could be seen from 300 miles away, and completely altered the planet's climate ...