New research led by a York University professor sheds light on the earliest days of Earth's formation and potentially calls ...

Earth, our home planet, is a world unlike any other ... Beyond the outer core lies the mantle, a 1,800-mile-thick layer of viscous molten rock on which Earth's outermost layer, the crust, rests.

The first layer is the crust, a thin outer shell that extends about 18 miles (30 km) below the planet's surface. The next layer, the mantle, stretches about 1,800 miles (2,900km) below Earth's ...