The geodynamo's unique longevity.

The article focuses on the dynamo process in the Earth and its importance in the longevity of the magnetic field and core and mantle in the planet. It says that the dynamo region in the solid silicate mantle can support the global system of plate tectonics resulting to the sustainability of the dynamo process in the Earth. It mentions that the supercritical state of geodynamo is responsible for the polarity reversals of the solar dynamo.