Inner Core of Earth Has Its Own Inner Core, Geologists Say

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http://www.sci-news.com/geology/science-...02479.html

EXCERPT: An international team of geologists, headed by Prof Xiaodong Song from the University of Illinois at Urbana-Champaign and Nanjing University in China, has found that the Earth’s inner core has an inner core of its own, which has surprising properties that could reveal new information about our planet....