Earth's crust was unstable in the Archean eon and dripped down into the mantle
Model calculations indicate that the extreme density of the base of the thickened primary crust caused it to subside into Earth's mantle.
Researchers from Brown University and the University of Hawaii have found some mineralogical surprises in the Moon's largest impact crater.
The Earth is dynamic. Indeed, what we perceive as solid ground beneath our feet is constantly changing.
Physicists say it's possible to use the whole earth as a particle detector, to look for evidence of the mysterious 'fifth force'.
So-called super-Earth planets may have a magnetic shield that could protect any life present from harmful radiation, say researchers.
There's vastly more water in Mars's mantle than previously thought - as much as on Earth, in fact - dramatically raising the chances that the planet might once have sustained life.
Geologists have embarked upon an ambitious project to drill through the earth's crust and extract a sample of the mantle.
The world's deepest drill is currently being prepped to pierce the Earth's enigmatic mantle.