Our planet has been asteroid-smashed, melted and eroded, enough that most of its original armor has been long buried. Except ...

This "virtual Earth" is the first computer model that "views" the crust and mantle as an interconnected, dynamic system, the researchers reported Oct. 30 in the journal Science Advances.

Earth's mantle -- the layer between the crust and the outer core -- is home to a primordial soup even older than the moon. Among the main ingredients is helium-3 (He-3), a vestige of the Big Bang ...

Earth is missing a huge part of its crust. Now we may know why. A fifth of Earth’s geologic history might have vanished because planet-wide glaciers buried the evidence.