Earth's inner core swings about 2.35 degrees over roughly 70 years, and its gravitational pull changes the length of a day by ...
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What lies beneath: Earth's inner core could have 'extreme hydrogen' unlike anything seen on surface
Earth's inner core is filled with a rare material known as 'extreme hydrogen', a study has claimed. This bizarre substance, known as super–ionic hydrogen, behaves unlike anything found on the surface.
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