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Scientists accidentally discover Earth's inner core is less solid than expected

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Researchers from the University of Southern Carolina studied seismic waveform data from earthquakes.

They found seismic waveforms held some uncharacteristic properties the team wasn't expecting to see.

The data led them to believe the inner core might be moving around a bit, rather than staying completely solid.

The research was published on Feb. 10 in the journal Nature Geoscience .