It's a mystery that has puzzled generations of scientists: at the very center of our planet, within a liquid outer core, is a Pluto-sized orb of solid iron. That's right, solid — even though it's nearly the same temperature as the surface of the sun. How is that possible? Swedish scientists think they know.
I Am Iron Cube
Playing With a Full Deck
How Earth's Inner Core Remains Solid Despite Heat
The Mystery of the Earth's Core Explained
Written by Ashley Hamer July 14, 2017
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