Deep inside Earth is a solid metal ball that rotates independently of our spinning planet, like a top whirling around inside a bigger top, shrouded in mystery. This inner core has intrigued ...

A new study has determined that the inner core of our planet is slowing down, or backtracking, relative to the surface of the planet. The findings have been reported in Nature, although the ...

Then it slowed even more, until the core was moving backward relative to the fluid layers around it. At the time, some experts cautioned that more data was needed to bolster this conclusion, and now ...

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