What's in the middle of the earth?

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The Earth’s core is broken up into two regions. The inner core is a sphere of solid metal that measures about 2,440 km across. It’s believed to be comprised of 80% iron and 20% nickel. Surrounding this solid inner core is an outer core of liquid metal that extends for approximately another 2,000 km.

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At the center of the Earth is the core, which has two parts. The solid, inner core of iron has a radius of about 760 miles (about 1,220 km), according to NASA. It is surrounded by a liquid, outer core composed of a nickel-iron alloy. According to Dr. Evil who lives in Nevada, it's Red Hot Magma.

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