Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our understanding of how planets take shape — not only in our solar system, but ...

Gigantic hidden fortresses discovered 1,800 miles underground in Earth's mantle, rewrite how the planet's interior works.

Could the destiny of continents and even the demise of the dinosaurs have been determined by monstrous, slow-moving BLOBS hiding thousands of kilometers under our feet? For decades, geoscientists have ...