On May 2, as sunlight crept over the Martian horizon, the Odyssey spacecraft captured Arsia Mons, a towering, long-extinct volcano, puncturing a glowing band of greenish haze in the planet’s upper ...

An underwater volcano located off the U.S. West Coast may be on the verge of erupting. Axial Seamount, about 300 miles (480 ...

Although volcanic eruptions may seem like a distant worry for many of us, about 10 percent of the world's population lives ...