"We believe the inner core rotates, relative to the Earth's surface, back and forth, like a swing," they told AFP. "One cycle of the swing is about seven decades," meaning it changes direction ...

According to the scientists, the inner core rotates faster than the Earth's surface for about half ... To you, it will look like the spot "reversed direction" even though it's still rotating ...

When scientists attempt to “see” all the way through the planet ... This shift makes Earth rotate faster, and the length of a day shortens. But such rotational shifts translate to mere ...

According to the scientists, the inner core rotates faster than the Earth's surface for about half the cycle ... To you, it will look like the spot "reversed direction" even though it's still rotating ...