‘New hidden world’ discovered in Earth’s inner core

Earth’s “strong” internal core may truly be a bit mushy, researchers now discover.

For over half a century, the scientific group thought that Earth’s internal core was a strong ball of compressed iron alloy surrounded by a liquid outer core. However new analysis, printed Sept. 20 within the journal Physics of the Earth and Planetary Interiors, means that the firmness of the planetary ball ranges from arduous to semisoft to liquid steel.

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