A new look at an ancient volcanic blast on Mars suggests that the Red Planet was much more Earth-like billions of years ago, with abundant surface water and a relatively thick atmosphere ...

The 1990s focused on rebuilding and establishing new visitor facilities, including the Johnston Ridge Observatory, which ...

A 4.6 magnitude earthquake has struck just miles from a volcano in Alaska that is showing signs of unrest and the potential for eruption ...

A volcanic eruption in Indonesia on Monday sent an ash cloud soaring about 11 miles high, far higher than a plume produced by the same volcano when it erupted last month. Mount Lewotobi Laki-laki ...