Hidden barrier found 400 miles inside Venus that blocks rising hot rock and creates ring-shaped volcanic features called ...

For years, scientists were mystified by the origins of Hells Canyon, the deepest river gorge in North America. This massive natural wonder is a staggering ten miles wide and plunging more than 2,400 ...

With unprecedented clarity, scientists have directly observed a subduction zone—the collision point where one tectonic plate ...

Venus is often called Earth's "sister planet" because of their similarities in size, mass, and composition. Both are rocky ...

Fountains from the south vent at Kilauea's summit crater soared 1,300 feet (400 meters) into the air, the U.S. Geological ...