University of Illinois at Urbana-Champaign

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• Earth's inner core is doing something weird

  Aug 20, 2019 11:45 am by National GeographicIllinois in the News
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  National Geographic (Aug. 19) Earth's inner core of iron floating in molten metal is free to turn independently. Illinois' Xiaodong Song says it’s possible the rate of inner core rotation varies over time. 

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