The oldest crust on Earth, known to be unchanging, is actually being altered in real time. The North American continent is ...

The deep roots of Earth's oldest continents have long been thought to be unshakable. But a new seismic discovery suggests that even these stable landmasses can change. Beneath the center of North ...

Beneath America, something ancient and invisible is at work. Deep under the heart of the Midwest, a long-buried slab of Earth ...

North America is dripping—with sizable blobs of rock sinking from the underside of the continent, beneath the U.S. Midwest, ...