Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds.

Deep beneath California's Sierra Nevada mountains, geologists have found evidence of Earth's rigid outer layer sinking into ...

The only exception has been where the mantle is exposed by faulting, where a crack forms in the Earth's crust. I was part of an international team which retrieved a record-breaking 1,268m-long ...

Water exits through a movable part called the funnel, which controls the angle of the spray. The mantle cavity also aids in respiration by bringing water to the animal's gills, which in turn ...

The plates make up Earth's outer shell, called the lithosphere. (This includes the crust and uppermost part of the mantle.) Churning currents in the molten rocks below propel them along like a ...