Scientists may have solved a mystery of how Earth recycles its carbon, and what it could mean for the future. The general understanding of how Earth's climate is regulated is that it happens through the climate-sensitive reaction of carbon dioxide (CO2) removal by the weathering of silicate rocks on land.

A chemically stratified core influences heat flow, convection in the outer core and Earth's magnetic field stability -- key factors in planetary habitability compared to Venus and Mars.

A chemically stratified core influences heat flow, convection in the outer core and Earth's magnetic field stability -- key factors in planetary habitability compared to Venus and Mars.