Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds. Known as large low-seismic-velocity provinces (LLSVPs), these blobs are both hotter and ...

“It’s like trying to find your way through a maze the size of Earth. These are very long paths that you have to test out, and there’s only one path that works.” To that end, the new Caltec ...