Earth's core has a core of its own

February 11, 2015 3:57 PM

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Earth's core has a core of its own

In research that didn't involve incredible advances in drilling technology, researchers have found some surprising secrets at our planet's core. What was once thought to be a single core of solid iron actually contains an inner core of its own with properties very different from what geologists who measured earthquake waves now refer to as the "outer inner core," CNET reports.

The iron crystals in the "inner inner core" are aligned on an east-to-west axis, while the outer ones are aligned north to south, according to the researchers, whose study was published in the journal Nature this week.

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