Scientists warn that Hawaii's Kilauea volcano is on the verge of a new explosion that could send ash, steam and sulfur dioxide spewing from the summit crater and toss six-foot wide boulders as far as a half-mile away in all directions.
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In the proposed new picture, the engine behind Earth's interior processes is not heat from the core but cooling at the planet's surface. This cooling and plate tectonics drives mantle convection, the cooling of the core, and Earth's magnetic field. Volcanoes and cracks in the plate are simply side effects.