Guatemala remained on alert Tuesday after evacuating villages during an eruption of the Fuego volcano, one of Central America's most active. About 1,700 people remained in shelters with the ...

The surface of Mars is covered in intriguing features that suggest hints about the planet's past and the water that once existed on its surface. New research has suggested that some lava-like ...

Mount Rainier towers over the Seattle-Tacoma region as the tallest volcano in the Cascade Range, its glacier-clad summit a fixture of the Washington skyline. To many who live in its shadow, the ...

Scientists have been able to recreate the extreme conditions found on icy moons in deep space—and revealed the unstable behavior of water. In the near-zero pressure environment of space, water reacts ...