The boundary between the two lies about 465 miles (750 kilometers) beneath the Earth's surface. The crust is the outermost layer of the Earth. It is the familiar landscape on which we live ...

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. On land, the continental crust is an average of 19 miles ...

Originally intended as a scientific exploration of the Earth’s crust, the project uncovered ... and Super Bowl I’ve studied over 200 kids—the highly successful ones have parents who did ...