Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...

Two huge masses deep within Earth may have ... objects are extremely old, with origins going back at least half a billion years and possibly even to the formation of the planet more than 4 billion ...

Research on hidden structures deep within Earth’s mantle challenges theories about our planet’s middle layer and could ...

Giant blobs that lurk near Earth's core are ... part of the mantle is made of old tectonic plates that break into tiny pieces when they sink deep enough into the planet. The LLSVPs, by contrast ...