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Earth's inner core: Nobody knows exactly what it's made of, but now we've started to uncover the truth

The iron-rich core at the center of our planet has been a crucial part of Earth's evolution. The core not only powers the ...

Earth’s inner core: nobody knows exactly what it’s made of – now we’ve started to uncover the truth

The iron-rich core at the centre of our planet has been a crucial part of Earth’s evolution. The core not only powers the ...