The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

Scientists Baffled to Find Signs of Another Core Within Earth’s Inner Core, Say ‘We Have to Rewrite the Textbooks’ For ...

Planet Earth is not a solid ball of rock, it's made up of different layers ... is made of liquid iron and nickel. The inner core is made from solid iron and nickel. In this diagram, the red ...