Earth's inner core may have stopped turning: study
Earth's inner core may have a whole other core inside it
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There's Another Core Within Earth's Core, Scientists Discover
Earth's inner core may have a whole other core inside it
Earth's core: Scientists think they've found another core at the centre of the Earth - BBC Newsround
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After a 20-Year Search, Scientists Have Finally Found Earth's True Innermost Core : ScienceAlert