Even though it is hotter than the surface of the Sun, the crystallized iron core of the Earth remains solid. A new study from KTH Royal Institute of Technology may finally settle a longstanding debate over how that’s possible, as well as why seismic waves travel at higher speeds between the planet’s poles than through the equator.
Spinning within Earth’s molten core is a crystal ball – actually a mass formation of almost pure crystallized iron – nearly the size of the moon. Unde...
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