Earth science

Situated at the juncture between Earth's iron metal core and the dense rocky mantle above, the core-mantle boundary (CMB) constitutes a realm characterized by extremes—featuring temperatures soaring into the thousands of degrees Fahrenheit and pressures surpassing a million times those experienced at the Earth's surface. Despite its seeming remoteness from our everyday terrestrial environment, material plumes emanating from the CMB can gradually ascend through the planet over tens of millions of years, exerting a profound influence on the chemistry, geological structure, and plate tectonics of the surface world where human life unfolds.